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305 to 350 engine swap

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Old 06-09-2015, 10:58 PM
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Car: 1986 Camaro Z28 Iroc-z
Engine: 350 TPI
Transmission: 700R4
305 to 350 engine swap

So i posted this forum a couple years back and have never fixed the problem and i didn't have time to fix it and dropped it off with somebody that said they could fix it and they gave me some ideas but couldn't fix it so maybe you guys can help

So i swapped my 305 with a 350 with tuned port injection, and naturally cant get car to start replaced everything we needed injectors memcal etc. and used a noid light and no signal from injectors whatsoever but when we replaced the computer with a random one we found out of a junkyard thats for a 92 S10 blazer it starts but wont idle below 1500rpm. And we know its not the computer because we got a new one and then anouther one and another and we also ran them in a 86 corvette to check them and it worked in the vette. so we are needless to say stumped. we know its not the ground we had some guy come over and check all the grounds and there all now grounded straight to the battery plus the car runs with this other computer. so any ideas?

When i picked up the car the guy told me that he could get it running sometimes not often he said all he did was move around the wires in the passenger in the engine compartment and somehow it would start up we had everything changed bought the right computer for the swap the prom all from GM checked distributor actually replaced it and thats how he could get it running sometimes so any suggestions?
Old 06-09-2015, 11:19 PM
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Car: 1991 camaro rs
Engine: tbi 350
Transmission: not sure
Axle/Gears: not sure
Re: 305 to 350 engine swap

Is it turning over the times it won't crank? If not maby the starter.
Old 06-09-2015, 11:21 PM
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Car: 1986 Camaro Z28 Iroc-z
Engine: 350 TPI
Transmission: 700R4
Re: 305 to 350 engine swap

Yes it turns over every time i turn the key and i can't get it to start
Old 06-09-2015, 11:26 PM
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Car: 1991 camaro rs
Engine: tbi 350
Transmission: not sure
Axle/Gears: not sure
Re: 305 to 350 engine swap

If it was working sometimes when you would wiggle some wires I would think it would be something to do with those wires.
Old 06-10-2015, 12:05 AM
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Car: 1986 Camaro Z28 Iroc-z
Engine: 350 TPI
Transmission: 700R4
Re: 305 to 350 engine swap

Probably or a short somewhere should I replace the wiring harness or can someone tell me which it might or why?
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