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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758571
03/04/15 08:37 PM
03/04/15 08:37 PM
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Posts: 14,889
up yours
Supercuda
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10-4, I seem to recall something about possible wire corrosion by the battery, as that's where the computer is. Though it might be FWD vehicles of that era I am thinking of. Not trying to steer you wrong, but it's been a while.
Try wiggling the wiring around and see if the signal changes, that would indicate an intermittent issue.
I browsed Rockauto to see if they had a computer for you, no California emissions with an auto listed. They have Cal with a stick and Federal for both.
Last edited by Supercuda; 03/04/15 08:41 PM.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Supercuda]
#1758573
03/04/15 11:14 PM
03/04/15 11:14 PM
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Joined: Jan 2015
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San Diego
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Quote:
10-4, I seem to recall something about possible wire corrosion by the battery, as that's where the computer is. Though it might be FWD vehicles of that era I am thinking of. Not trying to steer you wrong, but it's been a while.
Try wiggling the wiring around and see if the signal changes, that would indicate an intermittent issue.
I browsed Rockauto to see if they had a computer for you, no California emissions with an auto listed. They have Cal with a stick and Federal for both.
For sure. I was looking at NAPA and they've got one for me for 214 after the core. I was so hoping it was some short I missed when I went through the whole harness while the engine was out. But it's looking like it might be the computer I think. I don't see why it would throw that code when I'm getting good readings from the sensor all the way to the computer. Unless it's an intermittent thing like you said. But I don't think it is because it seems to be constant. Never runs perfect.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758575
03/04/15 11:22 PM
03/04/15 11:22 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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Not sure what your options are, I hesitate to suggest running a federal spec computer as I do not know what, if any, difference it'll be. I guess all you can do right now is open it up and look closely at it. I have seen circuit boards crack across foil runs printed on them, I just solder a jumper across the crack.
as for you guys suggesting a carb, he's in California, that will not fly.
Last edited by Supercuda; 03/04/15 11:23 PM.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Supercuda]
#1758576
03/04/15 11:33 PM
03/04/15 11:33 PM
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Quote:
Not sure what your options are, I hesitate to suggest running a federal spec computer as I do not know what, if any, difference it'll be. I guess all you can do right now is open it up and look closely at it. I have seen circuit boards crack across foil runs printed on them, I just solder a jumper across the crack.
as for you guys suggesting a carb, he's in California, that will not fly.
For sure, that's my next step. Would be nice if it was just a blown capacitor or something I can fix on the circuit board. I fixed my video card on my computer by replacing the capacitor that was blown.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: d100dragracer]
#1758577
03/04/15 11:33 PM
03/04/15 11:33 PM
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Quote:
I agree totally. Im much much happier with a carb and Performer intake now than the TBI a lot more power and the fuel mileage is why better so much more reliable than before all wins switching to a carb. There is no way to make the power you can get from a carb using a TBI and the stock TBI intake they were junk. Mainly because of the junk wiring harness but it was never going to make any power no matter what. 
Quote:
that TBI setup is the WORST fuel induction Mopar ever used, except maybe the late 80s jeep RENIX (and only because I have zero experience with the Renix, just "heard about" them)
I can even deal with Lean burn easier.
About to do a motor swap into my son's 89 Ramcharger, just trying to decide WHICH 4 barrel to blow the dust off of among a few choices of on hand carbs...
I don't need to hear every guy that has given up on fixing their TBI the right way. I need helpful input on how to diagnose this, not just give up and throw a carb on it.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758579
03/04/15 11:37 PM
03/04/15 11:37 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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One other thing, i forget if I mentioned this, but, my bud's 89 Ram had driveability issues, I forget what they were exactly, but it turned out to be a crack between the exhaust crossover and the plenum of the intake. But I am pretty sure a TPS code was not one of the symptoms.
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758582
03/05/15 08:11 PM
03/05/15 08:11 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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Codes that set do not instantly clear even if the cause goes away, so it's possible you had an issue testing the TPS that set the code and when you pulled the computer is did a reset. I assume driveability is still the same?
I almost wonder if your EGR isn't leaking by causing this, similar symptoms. Can you block it off for testing purposes?
Did your vacuum readings ever stabilize?
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Supercuda]
#1758583
03/05/15 09:04 PM
03/05/15 09:04 PM
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Quote:
Codes that set do not instantly clear even if the cause goes away, so it's possible you had an issue testing the TPS that set the code and when you pulled the computer is did a reset. I assume driveability is still the same?
I almost wonder if your EGR isn't leaking by causing this, similar symptoms. Can you block it off for testing purposes?
Did your vacuum readings ever stabilize?
The code reset because I removed the computer and battery. and I didn't test the TPS again after the rebuild until after I saw the code. The driveability is the same, hesitation, stalling when I come to a stop. I tried blocking off the EGR before I did the rebuild but I'll try it again. I'll check the vacuum again. I assumed it was doing that because the timing was off but I shouldn't assume. I'll check it again right now.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758585
03/05/15 09:44 PM
03/05/15 09:44 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
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How much does the vacuum fluctuate when it stumbles?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: feets]
#1758586
03/05/15 09:47 PM
03/05/15 09:47 PM
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I can't get it to stumble while idleing anymore, it only stalls when I'm coming to a stop while driving. I'll take it for a drive with the vac gauge hooked up.
In park it will rev fine. But when I drive it, it has bad hesitation with some idle fluctuation and will stall when I come to a stop.
Last edited by Instigate; 03/05/15 09:49 PM.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758587
03/05/15 09:48 PM
03/05/15 09:48 PM
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Joined: Jan 2003
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Irving, TX
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If it only happens every time the vacuum is at a certain point you may be able to chase it down.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: feets]
#1758588
03/05/15 10:14 PM
03/05/15 10:14 PM
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San Diego
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Quote:
If it only happens every time the vacuum is at a certain point you may be able to chase it down.
I've never had to check vacuum while driving a vehicle so I'm not sure what is normal. I know it's normal for vacuum to drop when you accelerate but idk how much, anyways. While coasting I get around 19hg with a steady needle. When I stab the gas it drops to 5 or 6 and when it stutters and stalls it drops to nothing.
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Re: 89 318 TBI Freshly Rebuilt Engine Idle Surging / Stalls
[Re: Instigate]
#1758590
03/06/15 08:20 PM
03/06/15 08:20 PM
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Joined: Sep 2007
Posts: 14,889
up yours
Supercuda
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Yep, think you can probably rule out a mechanical issue at this point, at least with the longblock.
Fuel pressure looks good.
How about the ignition system? New, used? wires, plugs, cap, rotor, distributor?
They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.
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