after maf change. check engine light and weird shifting... help
#1
after maf change. check engine light and weird shifting... help
So I had a maf go out. Just changed it all warnings went off but ce light. So I did a ecu reboot. Did the trick. Worked perfect. Car ram like a dream. Smooth fast sonded great. The I'm driving home 2 days later and check engine comes back on and the shift is lagging and no acceleration between 2 and 3000 rmps. Wth happened? Any ideas or similar stories. Thanks
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#7
Ok so just got back.
P0171 system too lean (bank 1)
So they said that's and oxygen sensor. And the check engine light was triggered in the rpm range and speed I was experiencing the lag. They said a bad oxygen combo could easily give the problems I have been having. What do yall think? Should I order a new oxygen sensor??
P0171 system too lean (bank 1)
So they said that's and oxygen sensor. And the check engine light was triggered in the rpm range and speed I was experiencing the lag. They said a bad oxygen combo could easily give the problems I have been having. What do yall think? Should I order a new oxygen sensor??
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#8
#9
Too lean could be plenty of things, air/vacuum leaks are common. MAF could be, oxygen sensor as well.
This is a code you need to troubleshoot because if you throw parts at this it can get expensive. I had that fault but no obvious reason for it, because I tested and checked everything as well as other technicians. We all looked at fuel trims before and after, no issues figured it was something due to my aftermarket tune, i just disabled the code. I never did change the oxygen sensor like everyone suggested but it was reading correctly.
This is a code you need to troubleshoot because if you throw parts at this it can get expensive. I had that fault but no obvious reason for it, because I tested and checked everything as well as other technicians. We all looked at fuel trims before and after, no issues figured it was something due to my aftermarket tune, i just disabled the code. I never did change the oxygen sensor like everyone suggested but it was reading correctly.
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did you figure it out? I’m having the same issue currently it’s throwing MAF , throttle , and crankshaft sensors. Car revs to about 4k before shifting in second and randomly will lose power while accelerating trying to pin point it before I start dumping a bunch of money . Cleaned MAF problem is still there though
#13
Check the rubber "accordion" intake connection between the MAF and intake tube. If that gets torn it can cause all sorts of driveability issues. You can get a used one at a wrecking yard, the thicker neoprene ones from Z-1 Motorsports for about $40 or through the dealer you have to buy the whole intake assembly to get them and that's around $120.
#14
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did you figure it out? I’m having the same issue currently it’s throwing MAF , throttle , and crankshaft sensors. Car revs to about 4k before shifting in second and randomly will lose power while accelerating trying to pin point it before I start dumping a bunch of money . Cleaned MAF problem is still there though
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