Little problem...surging
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Little problem...surging
well, before I replaced the oil pan, the car would surge and stall untill it was warmed up, so I would warm it up for a minute and it would be fine. After replacing the oil pan (had an oil leak and oil pan was messed up) with the same one, just new, It doesn't want to idle at all. It is fine driving, but if it idles, it will surge bue not stall, it will go from around 200 rpm to about 900 rpm. when driving it will surge if I cruise at 1200 rpm. What is this problem. Oil is fine, coolant is fine.
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From: edge of the map
Car: red one
Engine: on the floor
Transmission: next to engine
Axle/Gears: the ones that turn
Re: Little problem...surging
Sounds like a IAC, do a search on it to see how to clean it, also check the TPS
Thread Starter
Supreme Member
iTrader: (7)
Joined: Nov 2006
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Re: Little problem...surging
both IAC and TPS are new. Not many miles on them. I think it may be a vacuum leak. Any other suggestions?
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Joined: Feb 2007
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From: Belleville,IL
Car: 92 Formula
Engine: 383 248/256 cam
Transmission: 700r4 3500 stall
Axle/Gears: 9" 3.89 gears detroit locker
Re: Little problem...surging
Your Iac and tps are both new but is the tps adjusted right?
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Supreme Member
iTrader: (7)
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Re: Little problem...surging
No idea. I will check. How hard are they to adjust and what should I adjust them to?
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From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
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Thread Starter
Supreme Member
iTrader: (7)
Joined: Nov 2006
Posts: 3,740
Likes: 15
From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Re: Little problem...surging
Ok, Thank you. I will check up on it tomarrow.
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What should my idle be at with my mods? Around 700 RPM?
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What should my idle be at with my mods? Around 700 RPM?
Last edited by Bullydawg; Jun 6, 2007 at 12:31 AM. Reason: Automerged Doublepost
Supreme Member
Joined: Aug 2004
Posts: 1,214
Likes: 3
From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Little problem...surging
Id say 650-700 should be ok.
Depends.. if your a stickler on fuel consumption
Oh yea, did you ever get that Y-pipe off the oil pan?
Depends.. if your a stickler on fuel consumption
Oh yea, did you ever get that Y-pipe off the oil pan?
Last edited by TPI; Jun 6, 2007 at 01:00 AM.
Thread Starter
Supreme Member
iTrader: (7)
Joined: Nov 2006
Posts: 3,740
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From: Alamogordo, NM
Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Re: Little problem...surging
I actually had a hard time putting it on. I got it on, but it is hitting the oil pan, so I think I am going to put some high heat cloth to help with the vibrations and heat.
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From: edge of the map
Car: red one
Engine: on the floor
Transmission: next to engine
Axle/Gears: the ones that turn
Re: Little problem...surging
Check mt post.....for the gear heads....
Last edited by joejoe; Jun 7, 2007 at 08:23 PM.
Supreme Member
Joined: Aug 2004
Posts: 1,214
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From: Norwich, CT
Car: '89 Trans AM/'88 GTA
Engine: (2) Tuned Port L98's
Re: Little problem...surging
when I asked if he had any luck with the Y-pipe.
That could be the issue, maybe.. throw any codes?