Check Engine Light and Misfire Due to One or More Stuck Closed Fuel Injectors on Chevrolet Express 1500

One or more fuel injectors may become stuck closed causing an engine misfire and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.

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Average mileage: 124,331 (25,000–274,000)
Engines affected: 4.3L V6, 5.0L V8, 5.3L V8, 5.7L V8, Gasoline
10 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004, 2006
26 people reported this problem
13 people shared problem details
2002 Chevrolet Express 1500- 4.3L V670,000
I think i have the same problem with fuel injector. The check engine light starts blinking when i go up the hill. I already replaced the catalytic converter. But that didn't help. I consulted with technician and he that that the problem is in the fuel injectors
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i have a check engine light on with the code p0303 i have changed the coil pac, changed the spark plug, checked the spark plug wire and still no luck what do you suggest i do next do you think it may be internal or is their something else i can check thank you cliff
Upvoted (13)Flag Inappropriate
Is there an additive which may restore this injector, or is too late and must be replaced.
2001 Chevrolet Express 1500- 5.7L V895,000
Misfire on cylinder 4. Started happening when I switched from premium gas to regular gas. I used premium gas for the longest time (as this van "appeared" to do better with gas mileage with premium 10.5mpg to 11.5mpg all local stop-and-go driving), but when gas got up there in cost switched to regular gas. It took about 6-9 months but then the check engine light would flash. I through a bottle of techron in it and it went away for a while. It came back so since then I've switched back to premium gas and the misfire hasn't reappeared...
Check engine has been on for a few months and the engine misfires, backfires, and chugs when you first start out. After it warms up it is fine. Today it stopped working. When you turn the key, you don't even get a click. Have cleaned battery terminals and posts, but i still does not even click. Ideas?
Engine light came on, it was running ruff and sound like there was a exhaust leak. finely the engine light came on I saw it starting blinking three times. Now it will start up but will not stay running. When I get it running as soon as I give it gas it dies.
Hi how are you. Sametimes ever 2 monts 2 days. Isnot starting. And i dont touch 2 days than My. Van after 2 day star .I don't know what is the problem.i went the mecanic he chance fuel senser.when I went the mecanic my car was starting .I tol him story he said maybe fuel senser than he change still I have same problem
2004 Chevrolet Express 1500- 5.3L V8123,632
The engine misfires and when I press the gas it doesn't have power and burns a lot of gas and it hasn't been fixed
Check engin light blink. Check your air filter. I change me problem gone
2000 Chevrolet Express 1500- 5.0L V8142,000
Cylinders 3 and 4 have a misfire when engine is started in the morning and really bad when its wet outside. I have changed plugs, wires, cap/rotor, my next step is changing the coil packs I guess. About to sell the thing if I can't figure this out! It's been to NTB and Firestone and neither one could find something wrong??? Idiots? Perhaps the dealer is my next repair place?
2003 Chevrolet Express 1500- 4.3L V6274,000
Same. Had to replace all spark plugs, same issue happening again.
1996 Chevrolet Express 1500- 5.7L V878,000
I got an oil change and then drove 160 miles to the nj shore and back . My van is shaking and putting while in drive , trouble code on my obd scanner is p0300 p .
2004 Chevrolet Express 1500- 4.3L V6136,333
Stumbling on eceleration
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