85 22re missing on #4

[azzzuki]

has good spark, good compression,picks up #4 sometimes when cold but when it comes to temp starts missing .
any ideas what to look for next ?
Don't know much about this truck i just bought it .
Thanks for any help.

 

[fjfodee]

Do a search for 22re injector problem. Early 22re's are known to corrode inside the harness at the injector connections. HTH

 

[catbird]

I would start with puling the valve cover and checking valve adjustment. If that checks out ok, you can rent whats called a "noid" light at O'rielleys or probably other parts stores. It plugs into the injector plug and flashes to make sure that injector is getting a signal from the ecu. You could also have a bad or clogged injector. In my case, I had a worn down cam lobe that was not letting the exhaust valve open. I had good compression, spark, and fuel but it was missing. If your spark plug is BLACK and your engine runs worse with #4 wire hooked up than disconnected a worn cam lobe could be your problem.

 

[TCinVA]

I had a dead cylinder on my son's 22RE and it turned out to be a clogged injector. Ended up changing the gas tank, it was full of rust.

 

[azzzuki]

thanks for all the input , turned out to be the wire harness ...

 

[pappy]

Not surprised.

Just so you know ... those injector connecters are available from Del City, at least for those of us with the square connector. I just replaced all of mine and fixed all those splices.