i have a code p0301 on 96 blazer with tbi. auto zone scanner says; 1 ignition system 2; vacume leak 3; injector fault 4; high or low fuel pressure.
i just bought this blazer not running i got it home and figured out that who ever put a new distributor in it had it off time. so i fixed the timing and it runs great drove it for a few days and then the ses light came on. i found all reciepts they had done to it including a tune up, new fuel pump, and distributor. it runs smooth it is not missing so i was wondering how to check the injector being that it is tbi thanks for any advice.

 

Check out this thread:
P030x - Random/Multiple Cylinder Misfire Detected

 

thank you very much

 

just thought i would share it was a cracked distibutor cap and thanks again for the info

 

Glad you got it fixed and thank you for the follow up.