88 iroc 5.7 need help cranks got fuel and spark no start
88 iroc 5.7 need help cranks got fuel and spark no start
i purcahsed a 88 5.7 iroc no start spray carb cleaner starts for a few seconds no fuel to fuel rail.so replaced fuel pump and strainer and fuel filter now got fuel at rail still no start any advice would appreciate.
thanks
adam
thanks
adam
Joined: Nov 2008
Posts: 2,097
Likes: 177
From: Milwaukee
Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
Are the injectors being told to fire? In other words, did you check for power and ground pulse to the injectors?
Senior Member
iTrader: (1)
Joined: Dec 2012
Posts: 629
Likes: 2
From: Western NY
Car: 88 convertible
Engine: 5.7L
Transmission: 4+3 maual
Axle/Gears: 3.07
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
Yes it will cause a no start. The shorted injector will not allow the ECM to pulse the injectors. Unplug the shorted injector and see what happens. You should probably get new injectors as the originals are probably all dirty anyway. Check the classifieds here at TGO or get a set of refurbished injectors from SouthBay, I read nothing but great praise of SouthBay from members who have dealt with them. GL!
Supreme Member
iTrader: (9)
Joined: Sep 2001
Posts: 2,984
Likes: 37
From: North Central Indiana
Car: 86 IROC
Engine: 383
Transmission: TKO 600
Axle/Gears: 3.54 Dana 44 IRS
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
When you key on with the engine off does the check engine light come on?
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Joined: Oct 2013
Posts: 316
Likes: 7
From: Florida
Car: 1987 Trans am
Engine: 350 Vortec Stealth Ram
Transmission: T-5
Axle/Gears: 02 SS Torsen Zexel 3.42
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
Probably got bad injectors. Same thing happened to me. Fuel sat for awhile. Replaced everything fuel related except for the injectors and couldn't get it to start. They ohmed out properly as well. But were clogged up. They were the stock multecs. Put in some Bosch 3s and fired right up.
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
wanted to update you guys,well good news got it started,set the timing tp specs.all new injectors and fuel pressure reg and fuel pump,sending unit,fule filter,fired right up.and actually the 5spd works well converted from an auto since its a 5.7 car.now dont know if im gonna keep her and get repainted or sell the car.
Joined: Oct 2013
Posts: 316
Likes: 7
From: Florida
Car: 1987 Trans am
Engine: 350 Vortec Stealth Ram
Transmission: T-5
Axle/Gears: 02 SS Torsen Zexel 3.42
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
Good news. Glad to hear it's up and running again and thanks for the update.
Supreme Member
iTrader: (9)
Joined: Sep 2001
Posts: 2,984
Likes: 37
From: North Central Indiana
Car: 86 IROC
Engine: 383
Transmission: TKO 600
Axle/Gears: 3.54 Dana 44 IRS
Re: 88 iroc 5.7 need help cranks got fuel and spark no start
why would you sell it now that its up and running and you can enjoy it.
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