What did I screw up? New question.......
#1774778
03/08/15 02:37 PM
03/08/15 02:37 PM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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In an effort to boost the MPG on my Dakota, decided to put plugs and plug wires on it this morning. Found this little gem when I pulled the cap off....... Now, mind you, it started fine and seem to run fine. No obvious miss or real roughness. Put all my parts on, WOW!!! What a difference! It was almost buttery smooth and I now had a traction problem taking off from a dead stop (roads are damp, wasn't doggin' it). Got home, turned it off. Cleaned up my work area, went to leave again, and, its running worse than poo......stalling, running REAL rough. Huh? When I parked it, it was fine. Doing nothing but letting it sit and restarting it, it runs terrible. Its bad enough I can't drive it. I've double checked my work. Double checked the cap, can't find any issues. I'm at a loss. Ideas?
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: SattyNoCar]
#1774779
03/08/15 03:06 PM
03/08/15 03:06 PM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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After typing that post, I went out, re-rechecked my work, still found nothing wrong, fired it up, and it was buttery smooth again. Drove it 2 miles with no issues, still smooth. Maybe computer was adjusting to new parts?
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: SattyNoCar]
#1774780
03/08/15 05:09 PM
03/08/15 05:09 PM
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Joined: Jan 2007
Posts: 685 pennsylvania
poboyengineering
mopar
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mopar
Joined: Jan 2007
Posts: 685
pennsylvania
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I had a similar problem when I changed the battery on my Ram. After a couple of minutes running it smoothed out and ran fine. Did you disconnect the battery?
It may be ugly, but it sure is slow.
Girls comb their hair in rear view mirrors and the boys try to look so hard....
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Re: What did I screw up?
[Re: poboyengineering]
#1774781
03/08/15 08:22 PM
03/08/15 08:22 PM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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Just got back from a 30 mile round trip. Truck ran flawlessly.......as long as it was moving. If I stopped briefly for a stop sign, it would dead miss once. If I stopped for a lengthy light, it would dead miss up to 5 times. By 'dead miss' I mean a miss that you couldn't help but notice, not one of those soft ones where you're not sure if it did it or not. And of course, its raining steadily now, so, I can't look at it anymore today.
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: rickstershemi]
#1774783
03/08/15 08:40 PM
03/08/15 08:40 PM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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Cap too. There was a pretty good gouge from where the rotor hit.... Marked each wire, and pulled cap off with wires in place. Installed new cap and followed wiring order from old cap. Checked, rechecked, and checked again that I didn't bust or pull loose a vacuum line that runs across the back of the engine. I'm lost.
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: rickstershemi]
#1774786
03/08/15 09:15 PM
03/08/15 09:15 PM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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No NAPA's close, went with BWD brand. The cheap Chinese caps were smooth inside, no ribs. The BWD cap has ribs inside and looked/felt like the better piece. I used Autolite plugs and wires. The truck had Champions in it, but, I've ALWAYS had problems with Champions, never had an issue with Autolites. Plug wires, basically the same deal as the cap. Didn't want the cheap chinese junk, but, didn't see the need to fork over $$$ for something like MSD wires, especially for a 150K 3.9 V6.
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: SattyNoCar]
#1774788
03/08/15 10:22 PM
03/08/15 10:22 PM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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Make SURE the cap is fully secured with BOTH screws fully engaged. DAMHIK
Robert
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: What did I screw up?
[Re: d100dragracer]
#1774790
03/08/15 10:28 PM
03/08/15 10:28 PM
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Joined: Jan 2005
Posts: 12,415 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,415
Kalispell Mt.
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I bet whoever screwed up the cap/rotor job before you twisted the distributor to get it to run, now it needs twisted back to the correct position.
Pull the cap, twist the crank till it is at TDC and check to see if the rotor is pointing at the "1" on the cam plate (if 180 or so out turn the engine one revolution) then if it is off twist the distributor to line up the "1" and the tip of the rotor.
It is more accurate with a scanner but this will get it close enough to run correctly.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What did I screw up?
[Re: HotRodDave]
#1774791
03/09/15 12:13 AM
03/09/15 12:13 AM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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Yes, screws for cap are tight, and I made sure no wires were pinched and the mounting service was clean. I carefully blew out all the plastic bits the original cap left behind (didn't use full pressure on the air hose). When the weather breaks, I'll check timing. I'm kinda at the mercy of the weather, and of course they say its supposed to rain all week. Thanks guys.
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: SattyNoCar]
#1774792
03/09/15 01:19 AM
03/09/15 01:19 AM
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Joined: Aug 2003
Posts: 954 garnett kansas
rhad
super stock
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super stock
Joined: Aug 2003
Posts: 954
garnett kansas
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my 92 dakota does the crappy run after shutdown,been doin it for years,started about the same time as the fuel started getting changed for emissions,its really bad in warm weather by the way my dist isnt moveable.there is a slot it the shaft that the hold down fits into and holds it in one place,also a bad crank sensor will make it run bad after a warm shutdown,ive heard of people slotting the holes in the crank sensor to advance the timing some,i never tried it
my ladder of success is missing some rungs
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Re: What did I screw up?
[Re: rhad]
#1774793
03/09/15 01:28 AM
03/09/15 01:28 AM
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Joined: Jan 2003
Posts: 18,406 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 18,406
UPPER MICHIGAN, MARQUETTE COUN...
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Quote:
my 92 dakota does the crappy run after shutdown,been doin it for years,started about the same time as the fuel started getting changed for emissions,its really bad in warm weather by the way my dist isnt moveable.there is a slot it the shaft that the hold down fits into and holds it in one place,also a bad crank sensor will make it run bad after a warm shutdown,ive heard of people slotting the holes in the crank sensor to advance the timing some,i never tried it
Wrong answer. Your magnum distributor moves like any other. Important point the distributor in a 92 or newer magnum motor does not adjust the timing. It only sets the cam reference signal. There is a procedure to do this. There is also a TSB for lower drive bushing wear and shaft wear.
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Re: What did I screw up?
[Re: NITROUSN]
#1774794
03/09/15 01:46 AM
03/09/15 01:46 AM
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Joined: Jan 2005
Posts: 12,415 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,415
Kalispell Mt.
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Correct. The drive ability problem is not from the fuel timing being messed up it is from the wrong plug getting fire.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What did I screw up?
[Re: HotRodDave]
#1774795
03/10/15 02:28 AM
03/10/15 02:28 AM
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Joined: Aug 2003
Posts: 954 garnett kansas
rhad
super stock
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super stock
Joined: Aug 2003
Posts: 954
garnett kansas
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take a good look at a 92 dist,on the housing there is a cut back spot where the hold down fits into,with a different style or modified hold down it can be made to turn,look up a picture on rock auto,you can see the recessed place on the body of the housing
my ladder of success is missing some rungs
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Re: What did I screw up?
[Re: Dodgeguy101]
#1774797
03/11/15 07:18 PM
03/11/15 07:18 PM
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Joined: Jan 2003
Posts: 8,160 Plymouth, MI
Blusmbl
master
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master
Joined: Jan 2003
Posts: 8,160
Plymouth, MI
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The last set of Autolites I put in a vehicle (a '79 Jeep CJ7) I was not happy with, it had a miss until I reinstalled the old plugs. If they didn't look fouled I'd try putting the old plugs back in it just to eliminate the plugs as a cause.
'18 Ford Raptor, random motorcycles, 1968 Plymouth Fury III - 11.37 @ 118
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Re: What did I screw up?
[Re: Blusmbl]
#1774798
03/12/15 12:04 AM
03/12/15 12:04 AM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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OK, stupid question time...... If the plenum gasket is 'bad', will it suck less oil with a substantial vacuum leak? If said vacuum leak is fixed, could I be oil fouling the plugs at idle? (that occasional dead miss I'm getting). I'll tell what I found after a response or two. (even at the risk of making my Dakota look like a complete POS, I'm trying to learn here)
John
The dream is dead, long live the dream.......😥
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Re: What did I screw up?
[Re: SattyNoCar]
#1774802
03/12/15 01:03 AM
03/12/15 01:03 AM
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Joined: Jan 2003
Posts: 16,808 Between Houston & Galveston TX
SattyNoCar
OP
Smarter than no class Flappergass by a mile
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OP
Smarter than no class Flappergass by a mile
Joined: Jan 2003
Posts: 16,808
Between Houston & Galveston TX
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Truck runs about the same, no worse, maybe a little better actually, but I still get the occasional 'dead miss' sitting at a light. Been racking my brain try to figure out what I might have done. I was a little distracted and rushing because of approaching rain when I swapped everything out. Then, I thought of it. While routing the pass. side plug wires, I noticed the hose for the PCV was barely on (at the manifold), so, I just pushed it on and went about my business. Looked at the hose tonite. Yeah, its as hard as you'd expect 22 year old hose to be, BUT, the underside is missing a chunk/section as long as the fitting coming out of the manifold. Looking down on the hose, you can't see it. With the hose barely on, this left the manifold port open mostly sucking just air. When I shoved it on, it was far enough that it was drawing from the PCV again. The missing piece is not laying down in the recesses of the manifold. Deliberate action by someone? When I posted the video of my truck in another thread, someone mentioned the idle sounded a little high. Hmmmmm. I haven't been able to swap PCV valves because the grommet is rock hard. So, with the hose hooked up, could it be sucking oil now?
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Re: What did I screw up?
[Re: SattyNoCar]
#1774804
03/12/15 03:02 AM
03/12/15 03:02 AM
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Joined: Nov 2006
Posts: 733 jacksonville,FLORIDA
slammedR/T
super stock
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super stock
Joined: Nov 2006
Posts: 733
jacksonville,FLORIDA
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So the truck only runs like doo doo at idle correct? the EGR valve if sticking open can cause a rough and want to run like crap at idle condition if it is opened at idle. The egr is used at part throttles to purge some exhaust gases into the combustion chamber to reduce the production of NOX for better emmisions. You could have a EGR valve that is sticking open after you drive it and come to a stop or off throttle and allow it to idle.
Next time you start it up and it is running smooth, unhook the vacuum hose to the EGR valve and then road test it and see if it idles better again.
Also fix your PCV hose and grommet, that id for sure a vacuum leak and causing the high idle condition. Might aswell put a new PCV valve in there while you are at it.
2000 Dakota R/T, 408 magnum, 727, Indy heads 1000cfm 4150 carb, 93 octane fuel. motor; 10.258 @ 132.78 200 shot; 9.262 @ 144.69 racemagnum
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