ok i have a 89 iroc z. 359 tpi i figured out it had a bad coolant temp sensor and if fixed why it ran horrible after it got warm. now it is just low on power. first off i can unplug #6 &#8 injector and engine runs the same. all other injectors change idle. i checkd voltage to the injectors and all are really close. i checked resistance of the injectors and the 2 bad one were around 16 if i remember right just like all the rest except one, which was #7 cylinder was like 11. so from checking that it seems like the injectors 6&8 would be good? any help would be appreciated.

 

Just because the injector ohm ok, doesn't mean they are working. However, you might want to make sure you are getting spark to 6 and 8 before you look at replacing injectors.

 

Running with a bad CTS sensor makes the ECM think it's -40c outside and add ckoke like crazy! That said I would pull spark plugs and inspect, probably sotted up and replace.

Any error codes? CEL on?

Get a cable and do some data logging to see what engine is doing.

HTH!

 

What cable and software do you need? I need to do some troubleshooting on my 92 305.

 

TunerPro RT is by far best and most versitle software for OBDI. Please pay the $30 so he keeps making cool stuff!
http://tunerpro.net/

Moates has an excellent cable and all the other cool stuff you can use.
http://www.moates.net/aldu1-and-cabl....html?cPath=64