305 tpi not running right...
08-22-2010, 05:27 PM
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Car: 92 sonoma
Engine: 1985 LB9 tpi, stock
Transmission: NV3500
Axle/Gears: g80, 4.11 posi
305 tpi not running right...
just got finished swapping a tpi 305 into my truck, and now it is annoying me on purpose...
when i crank the truck, it will rev to 2000 then drop down to 500 and stay for 2-3 seconds. then it revs up to 2000 again; repeat
HELP!!
EDIT: 86 tpi 305(MAF) ->s10 5 speed
when i crank the truck, it will rev to 2000 then drop down to 500 and stay for 2-3 seconds. then it revs up to 2000 again; repeat
HELP!!
EDIT: 86 tpi 305(MAF) ->s10 5 speed
08-24-2010, 02:16 PM
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Car: 92 T/A 'vert
Engine: Mild .040 over L98 4 bolt mains
Transmission: Mostly stock 700R4, 2600 Vigilante
Axle/Gears: LS1 3.42
Re: 305 tpi not running right...
Check your IAC and for vacuum leaks.
08-25-2010, 10:33 AM
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Car: 92 sonoma
Engine: 1985 LB9 tpi, stock
Transmission: NV3500
Axle/Gears: g80, 4.11 posi
Re: 305 tpi not running right...
no vacuum leaks, just re-set the iac and same deal...
08-25-2010, 12:48 PM
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Car: '89 IROC-Z
Engine: LSx
Transmission: T-56
Axle/Gears: 3.42
Re: 305 tpi not running right...
Is the TPS reading between .55v and .57v at idle? I saw you re-set the IAC but did you make sure the little metal point at the end is clean of any carbon/oil/dirt? You could also try taking the MAF sensor off and cleaning it with MAF cleaner, a dirty MAF will do some funky things. Have you driven it all, does it run ok under load?
08-26-2010, 06:55 AM
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Car: 92 sonoma
Engine: 1985 LB9 tpi, stock
Transmission: NV3500
Axle/Gears: g80, 4.11 posi
Re: 305 tpi not running right...
i have noticed, that when cool, it has a little hesitation off idle, but thats the only other funky thing that its doing right now... the tps is set, i set it per my manual (i dont remember the exact number, I'll have to re-check that) I'll clean the MAF when i get back to the truck, IAC is clean as it can be; BTW, what should stock fuel pressure be set at? I haven't changed injectors, the only thing done to it right now is 2.5 dual exhaust
edit: what's the best way to set idle without a tach? by ear is out of the question, since it has dual turndowns
edit: what's the best way to set idle without a tach? by ear is out of the question, since it has dual turndowns
Last edited by 55mikey55; 08-26-2010 at 02:34 PM.
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