88blackiroc

iTrader: (1)

Okay so me and my dad have a 88 iroc that had a 350 tpi engine and then another 87 with a 305. the 87 had the better body so we decided to swap the 350 into the 87.
we got everything finally hooked up and all of the electronics work that we know of. the problem though is that the fuel pump isn't working which is the only thing stopping the car from running we know of. we looked at the other car and the wiring harness seems to be completely different. is there anyway to get the fuel pump working without blowing the car up? the problem isnt the fuel pump as we hot wired it and then started the car for a good 10 seconds.
all the gauges but the tempature one works also so i dont know if that is another problem we would encounter or not. we really would appreciate some help.
also, one of the pistons seem to be off since we put the engine back in and had it started for that split few seconds, any guesses on why? it was fine before when we had it in the other car
THANKS

juanillox8

iTrader: (7)

what harness did u used for the swap? was the 305 tpi also??

juanillox8

iTrader: (7)

when u say the harnness look completely deferent, what do u mean by that???

also did u swap the ecm and prom or u still using the one in the 87?

88blackiroc

iTrader: (1)

we used the engine harness already from the 350 and plugged it where the 305 harness used to be and the fuel pump doesnt work unless we hot wire it. and the engine isnt running right when we do hot wire it it sounds like its missing and cuts off now and then. and ecm and prom? we both really arent engine guys but thought we knew enough to make this swap, guess not
we are using the engine computer from the 350 if that helps

juanillox8

iTrader: (7)

did u made sure that the c100 connector (the plug on the drivers side)pinouts were the same for both?

http://berlinetta.info/media/shopman...00Camaro88.jpg

http://www.austinthirdgen.org/mkport..._1987_C100.gif

there's a lot u have to take into consideration before swapping elictrical connections specially between years.

juanillox8

iTrader: (7)

have u checked ur fuel pump fuse and relay?

juanillox8

iTrader: (7)

was the 305 a tpi engine aswell or tbi??? if it was a tpi use the harness from that engine and use the computer from the 350

88blackiroc

iTrader: (1)

The full pump works because we can jump the fuel pump to get it to work but as I said t isn't right. And we will print those pages out and look at them tmr and get back to you if we hve any questions or if we solved it

88blackiroc

iTrader: (1)

edited

88blackiroc

iTrader: (1)

We can't use the other harness since the alternator is on the opposite side and the wires won't reach to the
the engine was a 305 tpi though

86blackiroc

iTrader: (12)

You can just extend the wires to the alternator. Is everything else about the same? Dual fans on both cars?

juanillox8

iTrader: (7)

i was about to say the same thing. either that or swap the brackets and pulleys from the 305 to the 350

88blackiroc

iTrader: (1)

So pretty much switch the wiring harness to the one in the 305? We're going to try that since something else isn't working which is why the car sounds so bad when it starts when the fuel pump is hot wired

88blackiroc

iTrader: (1)

And yes. Both have dual fans and everything looks similar

vetteoz

iTrader: (13)

Have you swapped the memcal ( chip ) from the 350 computer into the computer that is in the car?
If not computer still thinks there is a 305 in there

juanillox8

iTrader: (7)

OP said he's using the whole computer from the 350

88blackiroc

iTrader: (1)

We finally got the car running after switching the wiring harness!!
Thanks a bunch!!

86blackiroc

iTrader: (12)

Good to hear!