DTC diagnosis info......
09-09-2005, 10:29 PM
#1
DTC diagnosis info......
I scanned it tonight. Had 2 live codes.
P0303 Cyl 3 misfire detected
P0200 Injector ciruit malfunction
Anybody have any idea how to identify which is cylinder #3??????? Or have any idea why im throwing these dam codes??
P0303 Cyl 3 misfire detected
P0200 Injector ciruit malfunction
Anybody have any idea how to identify which is cylinder #3??????? Or have any idea why im throwing these dam codes??
09-09-2005, 11:51 PM
#2
Been there, done that....
Had the same codes but my P0200 said "Open Injector Circuit" same thing I guess. Before you go tearing everything apart check the injector connections. I had loose terminals inside the injector clip (the part that actually slides over the injector terminals) Unplug the #3 injector, Pull the white cap out and, Squeeze the metal parts back together and see if the connection feels tighter and hopefully the miss goes away. Are you feeling a misfire or just picking up the codes?
Number 3 should be the 2nd from the front on the passenger side. While the engine is running, pull that injector clip. If the idle stays the same then that is the bad one, if it gets rougher then plug it back in and keep trying until you pull a plug and there is no idle change. If the SES is telling you #3 then that is probably it. If the miss is intermittent just squeeze #3’s clips tighter, reset the codes and see if the SES come back. I spent weeks running this stupid problem down. Hope this helps you out.
Number 3 should be the 2nd from the front on the passenger side. While the engine is running, pull that injector clip. If the idle stays the same then that is the bad one, if it gets rougher then plug it back in and keep trying until you pull a plug and there is no idle change. If the SES is telling you #3 then that is probably it. If the miss is intermittent just squeeze #3’s clips tighter, reset the codes and see if the SES come back. I spent weeks running this stupid problem down. Hope this helps you out.
09-10-2005, 12:23 AM
#3
my thoughts exactly. i would check that injector before i tear anything apart. it could also be internal coil failure so keep that in mind if everything checks good and code won't go away try swaping the injector with new one or another one on your eng to check it may be opening up when it gets hot.(the coil that drives the injector)
09-10-2005, 02:10 AM
#4
Hot dam guys. It was an injector wire broken loose from the metal terminal in the plug. Holy ***** what a difference that made!!! Really is a blast to drive. This motor really makes some nice torque.
Like mentioned above I did a bit of an injector cutout test. Unplugged each till I hear no difference in idle. Sure enough, the wire was broken loose.
Thanks all!!!
Like mentioned above I did a bit of an injector cutout test. Unplugged each till I hear no difference in idle. Sure enough, the wire was broken loose.
Thanks all!!!
Thread
Thread Starter
Forum
Replies
Last Post
Velocity1
GMT 800 & Older GM General Discussion
6
09-22-2015 01:32 PM
creekrat
Tuning, Diagnostics, Electronics, and Wiring
2
09-10-2015 12:59 AM
Suburbazine
Tuning, Diagnostics, Electronics, and Wiring
10
08-09-2015 01:17 AM
black00chev
Tuning, Diagnostics, Electronics, and Wiring
15
07-31-2015 04:33 PM