This is probably a stupid question, but does it matter what connector goes to which injector on a 91' TPI? I'm trying to trouble shoot a misfire problem and when I removed my intake, stupid me didn't mark the injector wires....

Thanks!

 

No it does not matter on your TPI engine.

 

Just as long as they are on the correct side it doesn't matter, but that shouldn't be hard to figure out. If you suspect a misfire due to an injector not firing, you can test the resistance of each injector. I believe they should be around 17-18 ohms. Basically, if any are significantly off, there is a problem and you should probably get new injectors.

 

Thank you for your replies....I know I have the connectors on the correct side so I will check the resistance on the injectors this afternoon....Thanks again!

 

UPDATE: I checked the the resistance of all the injectors and they all checked around the same 18-19ohms. I found the plugs were all gapped to .035, so I regapped the plugs to .045. Also I found that my fuel pressure was a wopping 70psi!!! Ouch! So I turned that down to 50psi @ idle and 45psi @ 2000rpm. Problem solved! No more misfire! Thanks again for everyones help!

 

That'll do it.