HSR high idle! help
Thread Starter
Member
Joined: Oct 2007
Posts: 413
Likes: 1
From: O'Fallon Mo.
Car: 1992 Camaro
Engine: HSR 355, afr 195s, xfi280, Holley e
Transmission: t-5
Axle/Gears: Braced 10 bolt Auburn and 3.73s
HSR high idle! help
Swapped my stock throttle body to a holly 58mm and now after adjusting tps its idling at 1500 AFTER WARM-UP. cold it idles at 3500. Tps was fine before could it be bad now?
Member
Joined: Jan 2003
Posts: 212
Likes: 0
From: Calgary
Car: 1987 IROC
Engine: 383SR
Transmission: 700r4
Axle/Gears: 3.23
Re: HSR high idle! help
I would double check to see if there's a vacuum leak around the throttle body? Failing that, check your TPS voltage with a multimeter.
Member
Joined: Jul 2003
Posts: 141
Likes: 0
From: sw michigan
Car: 90 gta
Engine: 5.slow turbo
Transmission: tremec tko
Re: HSR high idle! help
I was battling high idle for 5years with my stock tpi. i thought it was a GEN 7 issue. then i thought it was an intake issue so i put the Stealthram on. still idled high. I put a turbo on and now it idles fine. I changed map sensors and injectors, never took the stealthram off. right before I put the turbo on i disconnected injectors one at a time and realized there was no change in rpm with 3 of them. maybe you have a sticking injector dumping fuel all the time. atleast it's easy to check on a SR. good luck
Thread Starter
Member
Joined: Oct 2007
Posts: 413
Likes: 1
From: O'Fallon Mo.
Car: 1992 Camaro
Engine: HSR 355, afr 195s, xfi280, Holley e
Transmission: t-5
Axle/Gears: Braced 10 bolt Auburn and 3.73s
Re: HSR high idle! help
update.... checked for vac leak. nothing... bought new tps CES light still on and still high idle. dont think its my injectors cause i can tap the gas out of gear and idle goes back down.... sometimes. i have no clue guess im going to break down and let a "professional" take a look. cant wait till im done with schooling... Banned
Joined: Jan 2008
Posts: 547
Likes: 0
From: Europe->Poland->Warsaw
Car: 1988 Pontiac Firebird
Engine: 305 LT1 intake&heads
Transmission: TH700r4
Axle/Gears: 3.73 10bolt GM
Re: HSR high idle! help
chceck IAC, mayby it stuck or is loose and that will casue such problems
best regards
best regards
Member
Joined: Jan 2003
Posts: 212
Likes: 0
From: Calgary
Car: 1987 IROC
Engine: 383SR
Transmission: 700r4
Axle/Gears: 3.23
Re: HSR high idle! help
Also, did you check the gasket between the upper and lower part of the stealth ram? Mine started leaking in there and idled retard high.
Supreme Member



Joined: Nov 2001
Posts: 2,266
Likes: 37
From: Canada,Ont
Car: 1987 TransAm Ttop
Engine: 2005 LQ4
Transmission: Ls1 T56
Axle/Gears: 3:54
Re: HSR high idle! help
can you adjust the idle set screw any lower and then do tha iac and tps setup procedure all over again.just slapping on the tb and driving isnt a good idea.id also check the tb gasket.get a small can of starter fluid or propane and spray around the intake..tb etc. try resetting the iac.other than that..then id blame the tb.good luck
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Thread Starter
Member
Joined: Oct 2007
Posts: 413
Likes: 1
From: O'Fallon Mo.
Car: 1992 Camaro
Engine: HSR 355, afr 195s, xfi280, Holley e
Transmission: t-5
Axle/Gears: Braced 10 bolt Auburn and 3.73s
Re: HSR high idle! help
after car warms up i can get idle down but not after tapping the gas. idle will go down to a grand which is about right but check engine light is still on... not sure anymore at this point. about to break down and take her to a shop.
Supreme Member
Joined: Aug 2003
Posts: 1,644
Likes: 4
From: Long Island New York
Car: 89 Formula 350
Engine: Forged 385 H/C/I
Transmission: 700R4-4300 Stall-lockup
Axle/Gears: BW 9 Bolt 3:70
Re: HSR high idle! help
so your saying you have a check engine light, what code did you pull?
Thread Starter
Member
Joined: Oct 2007
Posts: 413
Likes: 1
From: O'Fallon Mo.
Car: 1992 Camaro
Engine: HSR 355, afr 195s, xfi280, Holley e
Transmission: t-5
Axle/Gears: Braced 10 bolt Auburn and 3.73s
Re: HSR high idle! help
never ran the coad. went back to the old throttle body. there is an air foil on the stock throttle bodies that cover the i.a.c. air intake. with that on its pretty much closed. well the holly throttle body i purchased is wide open... bingo. my i.a.c. was stuck wide open but with the stock tb it was blocked off. Problem solved. thanks everyone for your help.
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