AP1 Misfire Once Again
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Valve adjust is free, so do that first. Overly tight valves will eventually cause a misfire. Once you rule that out, it cost typically $20 per injector to get tested and cleaned. Have them all done if you want to totally be sure to eliminate that variable. Comp test can be easily done for free by you, leakdown is a bit trickier and will need air compressor and proper gauge. Regardless if you do yourself or pay, this should be done to rule out bent valves or loss of compression after the valve adjust is done.
Last edited by s2000Junky; Jan 24, 2018 at 11:12 AM.
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Checking the valves is pretty easy, you may as well give it a shot now just to see.
Pulling the valve cover is a ten minute thing in these cars, then you just need the correct size feeler gauges with a 45* bend on them to do a very quick spot check for tight valves. (.008 / .010)
Compression test and leakdown test, man. That's where my misfire / idle rumble ended.
Pulling the valve cover is a ten minute thing in these cars, then you just need the correct size feeler gauges with a 45* bend on them to do a very quick spot check for tight valves. (.008 / .010)
Compression test and leakdown test, man. That's where my misfire / idle rumble ended.
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Joined: May 2016
Posts: 135
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Valve adjust is free, so do that first. Overly tight valves will eventually cause a misfire. Once you rule that out, it cost typically $20 per injector to get tested and cleaned. Have them all done if you want to totally be sure to eliminate that variable. Comp test can be easily done for free by you, leakdown is a bit trickier and will need air compressor and proper gauge. Regardless if you do yourself or pay, this should be done to rule out bent valves or loss of compression after the valve adjust is done.
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Joined: May 2016
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Let me tell you my story....
Had misfires... same type of codes..... replaced plugs, coil packs, etc....
Sent my injectors out for cleaning.... all came back good (supposedly)....
Misfire continued.
Borrowed a friends injectors (he's SC'd and doesn't use the OEM)....
Misfire is gone.... one of the injectors turned out to be bad. Replaced the injector for cylinder 2 after moving injectors around to find the bad one.
Still haven't figured out how I was getting misfire codes for all cylinders when only one was bad!
Had misfires... same type of codes..... replaced plugs, coil packs, etc....
Sent my injectors out for cleaning.... all came back good (supposedly)....
Misfire continued.
Borrowed a friends injectors (he's SC'd and doesn't use the OEM)....
Misfire is gone.... one of the injectors turned out to be bad. Replaced the injector for cylinder 2 after moving injectors around to find the bad one.
Still haven't figured out how I was getting misfire codes for all cylinders when only one was bad!
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