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Username Post: Suburban injectors not firing.        (Topic#341788)
Forum Newbie
Posts: 2

Reg: 01-09-17
01-09-17 11:03 AM - Post#2670275    

Okay, i bought this truck for 400 bucks. I was told it had these new parts.

New fuel pump
New fuel filter
And lines blew out.
New complete distributor and cap, just not installed.
He said it would only need distributor installed to run.
And had the ecm tested.

Heres what ive done.
Fuel pump was NOT new.
Had no fuel to throttle body. So i replaced it. I have fuel to throttle body now.
And i replaced the distributor.
I can pour a little fuel down the throttle body and it will fire.
I have nothing coming out of the injectors. Im going to try the noid lights this afternoon when i get off work. But im pretty sure theyre not firing. So if ecm isnt bad, distributor is new, and im getting fuel. What the hell else could be wrong?

Senior Chevytalk Moderator
Posts: 24322
Loc: Austin, TX 78748
Reg: 05-09-00
01-09-17 11:26 AM - Post#2670279    
    In response to Ghostoverride

Grab the codes off it. Send me an email. I'll email you a PDF TBI troubleshooting guide from GM.

You can find codes here too:


Timing check:

'95 Jimmy SLT (Bought @131,814)
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles

Edited by gchemist on 01-09-17 11:30 AM. Reason for edit: No reason given.

Forum Newbie
Posts: 2

Reg: 01-09-17
01-09-17 12:34 PM - Post#2670294    
    In response to gchemist

Checked codes and just got 12 over and over. So i suppose there arent any codes.

Xray Tedd 
Posts: 65

Age: 34
Loc: Missouri
Reg: 12-20-14
01-10-17 06:34 AM - Post#2670416    
    In response to Ghostoverride

A couple things to look at. First, check all your grounds. Also, you said you dropped in a new dizzy, Did this come with a new ICM? its located under the cap. If it did not, go ahead and replace it. If it did pull it off and have it tested. Also check your oil pressure switch located on the block behind the intake manifold. This sensor will shut off the injectors when oil pressure is lost.

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