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Showing results for tags 'miss'.
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KDP85 posted a topic in 2014-2018 Silverado & Sierra TroubleshootingHey all, so I have a 17 Silverado 5.3. 33000km was driving around yesterday. Truck was at operating temp and trans temp was at 76 so all was good. it was driving fine, then I got home. And backed into my driveway. Parked emptied groceries yadda yadda. 5 minutes later realized I had to pull in. Got in, and did just that. Then 5 minutes later had to run to corner store. This is when the truck started rough and check engine light started blinking and it was like I had no power. ( and when I say rough, it was god awful. Like bucking and lurching) Turned around a parked it. 2 hours later drove it 40km and not an issue. Next morning drive to and from work (7km each way) no issue. some say it can be the anti theft , or dirty injectors or worse clips or plugs. Trucks only got 33k help?!
Lost on a miss
Chevytrucks1974 posted a topic in 2014-2018 Silverado & Sierra TroubleshootingHi I have a 2015 Chev Silverado, 4.3 engine with a new engine put in 100,000km ago as oil pump went on it before. Now I have a miss on cylinder 5. I swapped coils from cylinder 5 to cylinder 1, new spark plugs put in on cylinder 5 and 3, put new spark plug wires on 1,3,&5. Got injectors all cleaned and tested. Checked and replaced the oil pressure filter on it. And still have a steady miss on cylinder 5 still, which is more apparent when the engine warms up. Did a compression test with cylinder 5 being at 130psi and cylinder 1 also being at 130psi and that was engine cold and hot . I am on a total loss of where to go now. Other than replace the engine or rip it all apart. Could use some insight PLEASE. Thanks in advance
It hesitates a little on almost every take off from a stop. Much more pronounced if I throttle it more. I.E. it is impossible to just launch out from a light most of the time. It's just sluggish until it kicks in after a second. The worst is around 45-50 in OD under partial load just trying to maintain speed... It misses enough to shake the whole truck and I have to punch it to get out of OD so I don't feel it anymore. I'm sure it's missing a little at other times but I can't feel near as much if the torque clutch is not engaged. I got a new MAF free from my neighbor so I threw it on today but it made no difference. My long term fuel trims are near zero at idle but jump up near 20 under acceleration and while driving they maintain around 15 or more. Do I just need new injectors? I have gotten a lean code both banks before but it's been a few months since that came up. New fuel pump only about a month old. Made no difference at all. I also did intake manifold gaskets this year. No change really. Need more ideas. Thanks!!
left side engine miss
arkhogs2011 posted a topic in 1988-1999 Chevrolet & GMC C/K GMT400 PlatformI have done all I can now I'm going to turn to you guys. have a 350 Vortec in a 96 GMC. I bought this truck about 6 months ago with no problems the engine is a JEGS motor with roughly 17k on it. I got some non ethanol fuel from an 'unknown' gas station and started to have an awful miss at idle. ran injector cleaner through it for about a week nothing helped still soaked plugs 2, 4 , 6, 8, were my problem children. Broke down pulled injectors out and replaced them put cab rotor and plugs in while I was there. Guess what same problem! But this has brought my problem down to only cylinder number 4. Did a compression check every cylinder passed moved on to an intake gasket sprayed brake clean around everywhere there could be a leak and nothing. Now we are to the point that it only does this when I start it hot or cold 90% of the time If I drive it just about any distance this will mostly go away with me only noticing it because I am now looking for it. Plenty of spark and fuel that is all going out of the tail pipe. Also now my only code is an o2 sensor which just started I would assume from all of my hard earn money going out the tail pipe. Any help or ideas is much appreciated!