TPI 42 and 43 codes error
 

Hello friends

I have trouble with engine.

At first i want to say, that i have L98 from vette 1987 rebuild to MAP and ECM 1991 Camaro.

Check engine light say, that we have 42 and 43 errors.

I think the reason is that i have distributor from vette and ECM from camaro.

Can it be the reason of trouble...

Buy the way, at 2000 turnaround i see Exhaust Manifold that was WHITE color, not red, not black - WHITE!!!!! Plastic parts was melt under the hood in few seconds

Re: TPI 42 and 43 codes error
 

Hei devorced could and coil in cap will swap no problem. As long as the 4 icm wires are hooked up correctly. Have you gone through the trouble tree for 42 & 43 ?
http://www.chevythunder.com/est_code_42.htm

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Check the ks ohms from the center pin to housing or ground. If it’s from tpi maf it will be 100 ohms tpi ss 3.9k .

Sounds like your super lean and need to check fuel pressure or possibly replace your injectors. Does the engine have a lean miss?

Re: TPI 42 and 43 codes error
 

Thank youfor link!
What does it mean "As long as the 4 icm wires are hooked up correctly" ?

Re: TPI 42 and 43 codes error
 

There are four cavity’s on the ignition control module. They need to be hooked up as followed see the icm pin letters. They are the same for y and f body’s. Just a large 4 way connector for large cap small for small cap.

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Re: TPI 42 and 43 codes error
 

Hers a easier to read flow chart for 43

http://www.chevythunder.com/esc_map_code_43.htm

Re: TPI 42 and 43 codes error
 

I wanted to change distributor from vette, drop it in trash and buy stock distributor from f-body 87-92. And than 42 and 43 errors will gone... But you want to tell me, that it will not help and i should not change distributor?

Re: TPI 42 and 43 codes error
 

Thank you. I will try to find out of this situation...

Re: TPI 42 and 43 codes error
 

No need to swap out the distributor. It could be a bad ignition control module or wiring issue. You should try to fix it before swapping out the distributor.

Re: TPI 42 and 43 codes error
 

42 and 43 errors gone. Thank you.
New detanation knock sensor help us.