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92 Ramcharger cold start #2711170
10/30/19 10:47 AM
10/30/19 10:47 AM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
Rhinotruck

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Round Lake Beach, Illinoisy
I have a 92 Ramcharger Canyon Sport plow truck that has a 5.9 fuelie that won't idle high when cold. If I keep me foot in it for a couple of minutes it will stay running, but if I start in and let of the gas it will die. What controls the idle at cold start?

IMG_20181020_131807657.jpg

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2711317
10/30/19 04:38 PM
10/30/19 04:38 PM
Joined: Sep 2003
Posts: 7,828
east side of Ohio
basketcase Offline
master
basketcase  Offline
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east side of Ohio
isn't there a throttle position sensor?


Dave


1981 Dodge D150 360 auto
Re: 92 Ramcharger cold start [Re: basketcase] #2711382
10/30/19 07:24 PM
10/30/19 07:24 PM
Joined: Jun 2006
Posts: 472
Central NY
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GarageDodge Offline
mopar
GarageDodge  Offline
mopar
G

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Posts: 472
Central NY
water temp sensor for the pcm,must read correct temp& idle control valve or motor control idle speed,hot or cold.

Re: 92 Ramcharger cold start [Re: GarageDodge] #2711443
10/30/19 10:28 PM
10/30/19 10:28 PM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
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Round Lake Beach, Illinoisy
I was looking at Rock Auto and it seems there are a few sensors that could cause this including the TPS. I am hoping someone would have been through this instead of just throwing parts at it. I am not at all familiar with Magnum engines. It runs find after it is warmed up.


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2711516
10/31/19 08:39 AM
10/31/19 08:39 AM
Joined: Jun 2006
Posts: 472
Central NY
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GarageDodge Offline
mopar
GarageDodge  Offline
mopar
G

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Posts: 472
Central NY
you need a scanner to check water temp when cold,should be close to air temp.Start with that,it tells pcm what mixture&idle speed should be.Alos check air temp sensor,should be within 10-12 degrees of water temp when cold.

Re: 92 Ramcharger cold start [Re: GarageDodge] #2711711
10/31/19 07:36 PM
10/31/19 07:36 PM
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Guitar Jones Offline
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If the battery has died or recently replaced the first thing to do is clean the throttle body. The PCM will lose it's memory and start over as if it's new so it expects to see a certain amount of air flow at idle. It the throttle body is dirty it doesn't have that. Plus cleaning the throttle body is free.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: 92 Ramcharger cold start [Re: Guitar Jones] #2711763
10/31/19 11:43 PM
10/31/19 11:43 PM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
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Round Lake Beach, Illinoisy
Originally Posted by Guitar Jones
If the battery has died or recently replaced the first thing to do is clean the throttle body. The PCM will lose it's memory and start over as if it's new so it expects to see a certain amount of air flow at idle. It the throttle body is dirty it doesn't have that. Plus cleaning the throttle body is free.


Interesting. I will do just that!


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2711939
11/01/19 05:04 PM
11/01/19 05:04 PM
Joined: Oct 2006
Posts: 7,358
Iowa
burdar Offline
Owen's Dad
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Posts: 7,358
Iowa
Do those have an IAC motor on the throttle body? I've seen those get carboned up and stop working properly.

Re: 92 Ramcharger cold start [Re: Rhinodart] #2712022
11/02/19 06:42 AM
11/02/19 06:42 AM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
master
Bad340fish  Offline
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Tulsa OK
I had a similar problem with my Jeep 4.0 and it was the idle air motor. But getting it on a scanner to take a look at coolant temp certainly wouldn't hurt.


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: 92 Ramcharger cold start [Re: Bad340fish] #2713503
11/06/19 08:52 PM
11/06/19 08:52 PM
Joined: Aug 2005
Posts: 5,993
Salem
Grizzly Offline
Moparts Proctologist
Grizzly  Offline
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Posts: 5,993
Salem
Could be the idle air control.

Helpful video here: Video

I have to give a mention to this Guy on Youtube, "Splelunkerd" that his 2nd Gen Ram videos are the best I've seen. He gives really clear instructions, lots of common sense style repair tips, and is smart as hell; worth subcribing or favoriting in your browser. twocents

This Fellow takes the whole thing apart, but I just pulled mine out from the back, cleaned it with brake cleaner and was good as new.

Usually, Rhino if it's the IAC the idle will wander when it's cold. Hopefully, this is what your issue is (free fix up)



Mo' Farts

Moderated by "tbagger".
Re: 92 Ramcharger cold start [Re: Grizzly] #2716922
11/17/19 09:40 PM
11/17/19 09:40 PM
Joined: Apr 2012
Posts: 76
South East Ontario, Canada
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Ramtough Offline
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South East Ontario, Canada
This being a 92 360, it should not be a magnum, 92 360 was TBI yet, Look on the drivers side of the of the throttle body there is a motor with a plunger, have a helper turn key off and on, this should move the plunger in and out, if it does not, you most likely need a new idle control motor, these were bad failing .

Originally Posted by Grizzly
Could be the idle air control.

Helpful video here: Video

I have to give a mention to this Guy on Youtube, "Splelunkerd" that his 2nd Gen Ram videos are the best I've seen. He gives really clear instructions, lots of common sense style repair tips, and is smart as hell; worth subcribing or favoriting in your browser. twocents

This Fellow takes the whole thing apart, but I just pulled mine out from the back, cleaned it with brake cleaner and was good as new.

Usually, Rhino if it's the IAC the idle will wander when it's cold. Hopefully, this is what your issue is (free fix up)


Re: 92 Ramcharger cold start [Re: Ramtough] #2717274
11/18/19 06:32 PM
11/18/19 06:32 PM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
Rhinotruck

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Posts: 43,458
Round Lake Beach, Illinoisy
Originally Posted by Ramtough
This being a 92 360, it should not be a magnum, 92 360 was TBI yet, Look on the drivers side of the of the throttle body there is a motor with a plunger, have a helper turn key off and on, this should move the plunger in and out, if it does not, you most likely need a new idle control motor, these were bad failing .

Originally Posted by Grizzly
Could be the idle air control.

Helpful video here: Video

I have to give a mention to this Guy on Youtube, "Splelunkerd" that his 2nd Gen Ram videos are the best I've seen. He gives really clear instructions, lots of common sense style repair tips, and is smart as hell; worth subcribing or favoriting in your browser. twocents

This Fellow takes the whole thing apart, but I just pulled mine out from the back, cleaned it with brake cleaner and was good as new.

Usually, Rhino if it's the IAC the idle will wander when it's cold. Hopefully, this is what your issue is (free fix up)



You are right, here are pictures of the passenger side of the TBI. I will check the other side now. I thought it might be one of these sensors...

93 Ramcharger tbi.jpg92 Ramcharger tbi sensors.jpg

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2718299
11/22/19 05:33 AM
11/22/19 05:33 AM
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Guitar Jones Offline
Paddle faster! I hear banjo music!
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Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
Well first things first, the MAP sensor is missing the vacuum hose.


"Follow me the wise man said, but he walked behind"


'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost coming soon!
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
Re: 92 Ramcharger cold start [Re: Guitar Jones] #2718454
11/22/19 08:17 PM
11/22/19 08:17 PM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
Rhinotruck

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Round Lake Beach, Illinoisy
The hose was going to the air cleaner, is it not supposed to go there? shruggy


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2718477
11/22/19 09:42 PM
11/22/19 09:42 PM
Joined: Jan 2008
Posts: 2,195
ILLINOIS
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volaredon Offline
top fuel
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top fuel
V

Joined: Jan 2008
Posts: 2,195
ILLINOIS
Nope. Straight to manifold vacuum. The MAP sensor is basically an electronic vacuum gauge for the computer.

Re: 92 Ramcharger cold start [Re: volaredon] #2719204
11/25/19 03:14 PM
11/25/19 03:14 PM
Joined: Jan 2003
Posts: 43,458
Round Lake Beach, Illinoisy
Rhinodart Offline OP
Rhinotruck
Rhinodart  Offline OP
Rhinotruck

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Round Lake Beach, Illinoisy
OK, I will check to see where the hose is supposed to come from, thanks!


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: 92 Ramcharger cold start [Re: Rhinodart] #2719223
11/25/19 04:29 PM
11/25/19 04:29 PM
Joined: Jan 2003
Posts: 8,005
Tulsa OK
Bad340fish Offline
master
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Tulsa OK
i saw that also but it would be super rich if the map sensor vac line was off, which would make it run better cold. That might be open for a barometric reading?


68 Barracuda Formula S 340
87 "Chrysler" Conquest
Re: 92 Ramcharger cold start [Re: Rhinodart] #2719639
11/27/19 04:35 AM
11/27/19 04:35 AM
Joined: Nov 2019
Posts: 8
Santa Clara, CA, USA
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altair18 Offline
member
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Joined: Nov 2019
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Santa Clara, CA, USA
Were you able to finish it?


Trying out bilstein shock and I'm very pleased how easy and smooth it is to drive my pickup in rocky terrain.






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