Re: 1989 cold start issues
[Re: wannadrag]
#2406370
11/20/17 03:46 PM
11/20/17 03:46 PM
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Joined: Mar 2007
Posts: 855 Southeast Pa.
SALEM1912
super stock
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super stock
Joined: Mar 2007
Posts: 855
Southeast Pa.
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Agree shouldn't be the ecm. Your truck should have air cleaner with the valve to draw warm air from the exhaust manifold when warming up. Make sure it is operating correctly. Also the vacuum hose should have a delay valve in it so it doesn't open on hard accelerate(vacuum drops off) You see in this picture the big tube is missing. Also your egr should not be opening till engine is at operating temp.
Last edited by SALEM1912; 11/20/17 03:57 PM.
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Re: 1989 cold start issues
[Re: wannadrag]
#2408692
11/25/17 03:36 PM
11/25/17 03:36 PM
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Joined: Jun 2005
Posts: 1,534 Florida
CHRGR69
pro stock
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pro stock
Joined: Jun 2005
Posts: 1,534
Florida
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Runs rough until warm. Sounds like a Mopar to me!
Grandma always said I had "hands of gold"!
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Re: 1989 cold start issues
[Re: poorboy]
#2415476
12/08/17 10:58 PM
12/08/17 10:58 PM
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Joined: Nov 2009
Posts: 1,281 WI
wannadrag
OP
pro stock
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OP
pro stock
Joined: Nov 2009
Posts: 1,281
WI
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Its got new plugs, plug wires, cap & rotor, and a new air filter, right? lots of people want to jump in on the hard stuff when the problem is often the basic stuff ignored. Gene Yup all new, I have a 91 also with a 360 and am thinking of taking the throttle body and trying it on the 89.I just don't get why it idles up and down till its warm. As soon as the temps got in the 40s it stated acting up. I bought the truck this summer so I am sure the issue was there already.
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Re: 1989 cold start issues
[Re: wannadrag]
#2419329
12/16/17 01:30 AM
12/16/17 01:30 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Just curious as when it runs bad cold whats the temp like where you are at when cold ? I ask because I had problems in winter time cold weather in Md where I live whenever it was cold and damp. But mine was a carb on my 318 Ramcharger. My problem was my hot air intake on the air cleaner was not working and after the truck started within a few minutes it started running bad and chugging as I found out the door on the air cleaner was not closing to give me hot air from around the exh manifold and it was still getting the cold damp outside air. What happened was the carb throttle blades were icing up even though it would happen at 30 to 45 degrees. I cant remember but you 89 should be throttle body injection and may still use the heated air intake from the air cleaner. When hot the door stays open and the air in the eng come from the air cleaner snorkel but when colder that door should get vacum to it from a temp sensor in the air cleaner that lets the eng now pull hot air from around the exh manifold shield. And believe me it makes a big difference in the right temp days that can be damp and chilly and the throttle blades can ice up real easy with cold damp air going by them. After I fixed my hot air door I could start my truck and go in the house while it warmed up. Five minutes later it was still running great but when it was not working it would die in about 2 minutes and run bad until the eng and under hood was warm. Dont know if thats your problem but its worth making sure the air cleaner door is working right. Ron
Last edited by 383man; 12/16/17 01:33 AM.
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Re: 1989 cold start issues
[Re: wannadrag]
#2419330
12/16/17 01:40 AM
12/16/17 01:40 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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After reading this more it sure sounds like your air cleaner door is not working to give the eng the hotter air from around the exh manifold. Because like you mine would start acting up whenever it got about 40 or below and your eng is throttle body injected so it still has the cold fuel going on the throttle blades like a crab does but a crab wont have fuel hitting the throttle blades at idle. Your Throttle body inj will have a little fuel going by the throttle blades at idle but not alot of fuel. Believe me I was surprised to find out that the throttle blades were actually icing a bit and it fixed mine right up when I fixed the air cleaner hot air door to work. Good luck , Ron
Last edited by 383man; 12/16/17 01:43 AM.
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