Ok here is the deal i just pulled an engine from my 86 gt and put in my 85 Se. The problem is it does not want to start right away, if i stay at it for awile, i can get it to start. But,it will idle from about 1000 down to 700rpm and die. After it warm up it will idle fine at about 950/1000rpm it throws codes 14 and 42 im thinking ignition module, what silicone do you use for install? Also as for the code 14(coolant sensor) this is the one with the black and yellow correct? I heard this can affect startup also. Thanks for any help

[This message has been edited by lowfunds (edited 04-21-2002).]

Did you take the computer along with the engine? Or at least transplant the chip?

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Mid Atlantic Fiero Owners Association
Keystone State Chapter, P.O.C.I.
P.O.C.I.

no i just kept the same ecm and transpanted engines, all the conections were the same. Would this be a problem?

[This message has been edited by lowfunds (edited 04-21-2002).]

Yes, the computers are different. Easy enough to do to check it.

The ecm from the transplanted car is an auto the 85 is a 4 speed i can't use the ecm from the auto or the chip.I just replaced the engine all else stayed the same.

[This message has been edited by lowfunds (edited 04-21-2002).]

Then I suggest you find an 86 4-speed chip, unless someone else has a better idea.

I had an 85 GT 4-speed for a while, happened to have a spare 86 4-speed chip. Plugged it into the 85's ECM just to see what would happen, and the car ran like sh*t. Hard starting, and loping idle. Didn't let it run long, shut it down and put the original back in, started the car and it ran fine.

Chips ARE different . . .

Ok have all codes clear except code 42. Car starts fine, but hesitates when given gas. Any sugestions?

[This message has been edited by lowfunds (edited 04-22-2002).]

Timing.

From experience.....make sure timing is ok...but it's prob an ignition module.

Phil

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GTDude
25 years GM experience