Chevrolet Blazer misfire problems

Filed Jan 28, 2026 · Engine · CA

The engine started acting weird in traffic going down hill on freeway. Eventually turned off turning into my driveway. No warning or engine light. Towed to dealer and is in for inspection, not sure if they can repair or if they have to replace the engine. When it arrived to dealer the engine light was on with a couple misfires

Filed Jun 4, 2008 · Fuel system · 85,000 miles · PA

The events that lead up to the failure of the fuel injection system equipped on my 2001 chevrolet blazer are in correlation to the manufacturers knowledge of having installed a defective product on 1996 - 2002 vehicles with sequential central port injection. After having to deal with the problem of figuring out how to fix the code p0300( random cylinder misfire) on my 01 blazer, I realized it was time to get more help from outside sources who have experienced similar issues with their vehicles. I've done enough research to know now that after eight years of owning the truck and dumping money into unnecessary repairs that chevrolet should fix this problem at their cost since they knew about it after being investigated by the california epa research division on air pollution back in 2003. They found the scpi system installed on models between 1996 and 2002 to be faulty creating a problem with the start up of many suvs which lead to emissions failure. I'm researching this now because I've finally connected the dots and realize that chevrolet knew about this problem many years ago and they cut a deal with the epa to extend the warranty coverage on such vehicles for 10 years or 200k miles in an attempt to satisfy california regulations. Well, what about the rest of the united states and how we deal with air pollution. I thought gm and chevrolet wanted to be the company that would set the example in "going green" for our planet. It doesn't make sense until you realize the amount of money that they save by not having to replace faulty fuel systems on older model vehicles which happen to be driven by people who are a lot smarter than they think. I've taken the liberty of filing my claim with chevy to resolve this issue. I'm hoping that this complaint along with valuable information on the internet as well as your web site can inform others of their rights and how we should all be covered under warranty to fix the problem permanently. Thank you for your time.

Filed Apr 1, 2007 · Electrical, Engine · PA

I bought the 2000 blazer used just over a year ago and have had nothing but problems. To begin, I replaced the alternator, fuel pump, and virtually all suspension components in the front end with just over 65,000 miles. On vacation during one of the hottest days of the year traveling home the blazer over heated and left my family and I stranded on a major interstate with no A/C for nearly an hour before getting towed to the worst chevrolet dealer in the country(richmond, va). We were forced to pay for a new radiator and miscellaneous parts totaling over $600. They said the coolant system was full of rust and the radiator was plugged and could not be reused. Now I'm experiencing the service engine soon that will not go out. After numerous trips to the dealer that started with leaking oil cooler lines, they said that the crank sensor was going bad. I replaced it, still the light stays on. Next they say there is a misfire in cylinder 2, I replace the plugs, wires, rotor, and cap. Still the light stays on. All of these repairs within the first 14 months of owning this junk and it is not anywhere near being paid for. Gm needs to fix these problems. I have spoke with other blazer owners and they too have experienced nothing but trouble. And the big 3 wonder why they are losing customers and market share. Have they ever heard of quality? Looks like I'm going foreign.

Filed Aug 24, 2006 · Fuel system · 00

Regarding cpi failure: check "o" ring behind fuel pressure regulator(rough idle,loss of power,reduced gas mileage; fuel in manifold; when testing fuel pressure it drops almost instantly when fuel pump shuts off) pretty easy to mistake for a cpi failure.

Filed Jan 15, 2004 · Engine · 20,998 miles · SC

I have replaced the following items on this 1992 chevy s-10 blazer in the year and a half that I purchased it: 1.egr valve 2.throttle control sensor 3.spark plugs and wires 4.rotor and rotor button 5.muffler system 6.pcv valve 7.fuel injector cleaned twice 8.oxygen sensor 9.lower ball joints and idler arm the first 8 items were replaced because of rough idling, smoke and sluggishness, and excessive use of gas($75.00 in a week). I also have a issue with peeling paint on the roof and sides of my truck, it is peeling in patches and the grey primer underneath is showing, this makes the truck look very bad.I was not aware that this was a major defect in this vehicle until recently and I want to find out how this can be fixed.

Filed Aug 29, 2003 · Brakes, Electrical · PA

Consumer stated that while driving and without warning, the egr valve failed, which caused the brakes to fail. Dealer notified. *ak the mixing with the fuel was the biggest problem. (when there was carbon build up in the egr valve, it would leave it open and caused no vacuum hard pedal and brake failure. When it rained or was cold the truck ran rough. The service light came on when the vehicle had run rough more than once, noise was present and there was a smell of burnt wires and the ignition switch was replaced, the brake pedal seemed soft on more than one occasion and the master cylinder and other brake components were replaced to try and solve the problem, the cd player had not worked since the ignition switch was changed, the rear windshield wipers had become inoperative, a noise would occur when turning but was not duplicated, and the muffler tail pipe had fallen off and rusted due to carbon build-up. The egr valve was cleaned but the problem persisted. The mechanic stated that in order to perform a proper job, the excessive carbon build up in the upper and lower intake manifold which effected the egr pendel, and the 02 sensor could cause a problem with the exhaust system, catalytic converter, fuel pump, the brakes, etc. The brakes squeaked, there were no dash lights, no air conditioning, and no 4-wheel drive. The fuel injections needed to be checked, and there were two recall stickers on the engine. *scc the rear wiper motor, fuel injectors and brakes were replaced.

Filed Apr 26, 2003 · Engine, Fuel system · 209,713 miles · SC

Vehicle uses excessive amount of fuel, replaced egr valve, throttle control sensor, oxygen sensor, cleaned fuel injector, replaced pcv valve, spark plugs, spark plug wires and still has rough idle and sometimes jerks forward when brakes are engaged. Also the service engine soon light frequently comes on reading a codes for the emissions system. Sometimes expels black smoke, and heavy smell of gas when first cranked. Could the federal safety agency help with this?

Filed Mar 31, 2003 · Engine · VA

Egr has been replaced twice since 1999 when I bought the vehicle. I just had the egr valve replaced yesterday and today the check engine light is back on and the nasty smell of exhaust/fuel is back in my vehicle. I also had the catalytic converter. Replaced two weeks ago. Vehicle runs rough and stalls without notice. Safety hazard! I have two small baby's and fear for their safety because of breathing in exhaust/fuel and vehicle stalling whenever. Mdh in virginia.

Filed Dec 1, 2002 · Fuel system · NC

Cp injector said to be leaking internally causing engine to run rich. Experiencing very rough idle, poor gas mileage, foul smell and hard start. Egr valve needs replacing again (2nd time in less than 2 years). Dt

Filed Oct 23, 2002 · Engine · MN

Consumer states engine light is coming on. Vehicle runs rough. Consumer states vehicle has had 5 fuel injectors installed. Mr