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1984 Pontiac J2000 Sunbird- High idle after engine swap
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JesseLD
New User
May 11, 2009, 11:07 PM
Post #1 of 5
(3411 views)
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1984 Pontiac J2000 Sunbird- High idle after engine swap
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Recently I swapped the engine out of my 1984 chevrolet cavalier into my 1984 Pontiac J2000 Sunbird. The Sunbird originally came with a 1.8L FI 4 cyl. turbo enginewhere as the cavalier had a 2.0L FI 4 cyl. engine. Swapped them out, changed out the ECM computer, disconnected the turbo gauge, changed out the wiring harness with the exception of the wiring underneath the dash as it it only seemed to have a couple differences that I had taken care of. It fired right up... everything was working, the only problem being the idle. In park the idle would hover around 3000 drop it into any other gear it would drop to 2500. I determined that the IAC valve was the problem for the most part after swapping it out with one that I had pulled from a parts car and it dropped to around 2000 in park and 1200 in any other gear. Though better I would like to find a way to drop the idle lower as it is still way higher than it used to be in the cavalier. One thought I had was that the IAC valve I threw in was not in the best condition, another possibility I came up with was the wiring may be off some where and I had over looked it... which may explain why the original IAC valve went out in the first place. If anyone has any ideas feel free to post them.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
May 18, 2009, 4:17 AM
Post #2 of 5
(3389 views)
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Re: 1984 Pontiac J2000 Sunbird- High idle after engine swap
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This is trouble from the get go IMO. Two different vehicles and engines - egad! You may have a throttle motor type thing that you can adjust - not sure - this is a creation - meaning not standard by any book now,
T
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autojoe
User
May 18, 2009, 6:33 AM
Post #3 of 5
(3384 views)
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Re: 1984 Pontiac J2000 Sunbird- High idle after engine swap
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some of the old throttle bodys had a plug that could be removed with a awl or pick and then under that was a throttle stop screw that could be adjusted.That may be a option.Have you checked for any vacuum leaks.some thoughts.I know you should not have to do that.
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Loren Champlain Sr
Veteran
/ Moderator
May 18, 2009, 5:03 PM
Post #4 of 5
(3378 views)
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Re: 1984 Pontiac J2000 Sunbird- High idle after engine swap
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Jesse; Make sure that you don't have manifold vacuum going to the EGR. Just a thought.
Loren
SW Washington
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JesseLD
New User
May 19, 2009, 1:48 AM
Post #5 of 5
(3365 views)
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Re: 1984 Pontiac J2000 Sunbird- High idle after engine swap
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Solved the idle problem. Frayed cable going to the throttle was holding it open a bit. Anyways, the idle on that particular engine has no way to manually adjust without modifying some of the parts. Now I get to have fun trying to figure out why it is over heating! The engine swap itself was painless, motor mounts lined up perfectly, all of the components not mounted to the engine were identical. Only parts I had to swap aside from the engine were the CV joints, wiring harness and ecm computer. I suspect the heating issue is caused by the lack of power going to the fan for some reason or another so that should be a straight forward fix. Thanks for the assist, if for some reason this over heating issue becomes a pain to solve I may be back soon.
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