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LMC Truck



Username Post: 2004 Blazer P0200 code        (Topic#345502)
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-18-17 01:34 PM - Post#2696406    

I just put everything back together after installing a intake manifold gasket, now it idles rough and giving me a P0200 (open injector circuit) code.
Has anyone else chase this one down? Where do I start?



 
LMC Trucks
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-18-17 03:48 PM - Post#2696417    
    In response to Kyle700

Is it possible to idle rough and get this code if the distributor is off by one tooth? Didn't have the problem before the tear down, I did overheat and have to be towed home...



 
Shepherd 
Contributor
Posts: 885

Loc: Lake George, NY
Reg: 11-11-15
06-18-17 04:37 PM - Post#2696420    
    In response to Kyle700

Sounds like a bad connector to one injector, based on the code and symptoms.



 
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-18-17 04:42 PM - Post#2696421    
    In response to Shepherd

I can't find injector connections, the research I have done talks about the "injector spider." I rechecked the large injector plug on the top on the firewall side on the throttle body



 
Shepherd 
Contributor
Posts: 885

Loc: Lake George, NY
Reg: 11-11-15
06-18-17 06:59 PM - Post#2696444    
    In response to Kyle700

Correct, that is a Vortec injection system. Make sure you have good connections at the junction for starters, the code points to one open injector, if you let it run some you should get a p0300 code, this may pinpoint the suspect injector. Careful not to over heat the cat though.



 
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-19-17 10:52 AM - Post#2696551    
    In response to Shepherd

I let it run a bit and it came back with a P0303...#3 cylinder misfire



 
Shepherd 
Contributor
Posts: 885

Loc: Lake George, NY
Reg: 11-11-15
06-19-17 01:39 PM - Post#2696578    
    In response to Kyle700

Ok, so there is the issue, look at the wiring for that circuit.



 
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-19-17 11:01 PM - Post#2696682    
    In response to Shepherd

I cleaned and secured the injector plug and checked the #3 spark plug wire at the dist. What else is there to check? Also, what is the white clip that connects to the injector plug, just to secure the plug?



 
Shepherd 
Contributor
Posts: 885

Loc: Lake George, NY
Reg: 11-11-15
06-20-17 03:25 AM - Post#2696698    
    In response to Kyle700

The code is telling you you have an open circuit in #3 injector, check the the injector with an ohm meter.



 
junkman104 
Frequent Contributor
Posts: 1101
junkman104
Age: 58
Loc: Murphy N.C.
Reg: 01-25-14
06-20-17 04:09 AM - Post#2696700    
    In response to Shepherd

Did you unplug the injector harness and look down in the intake side? You may have bent one of the pins on the connector, it can happen.



 
Kyle700 
Forum Newbie
Posts: 12

Reg: 06-13-17
06-20-17 08:55 AM - Post#2696735    
    In response to junkman104

Yes, when I cleaned and made sure the connection was good.



 
LMC Trucks
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