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Old 03-09-2009, 07:49 PM   #5
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Re: 1998 Toyota 4Runner Possible Misfire

Originally Posted by Brian R. View Post
1. Are the new plugs DENSO K16TR11 or NGK BKR5EKB-11? Gap correct? (0.039-0.043")
2. Check vacuum hoses for bad fit or cracks.
3. Check injectors of 2 and 5 for correct voltage to open (9-14 V) and function.
4. Check resistance of injectors of 2 and 5 and opens and shorts in wiring harness for injectors.
5. Check fuel pressure and volume
6. Check MAF meter and ECT sensor
7. Check compression, valve clearance, and valve timing (timing belt).

I did number one, and noticed I had the wrong plugs in, they only had the one prong, not the two. I replaced all the plugs with the double prong spark plugs. The light still came on. I moved to #2, I sprayed carb cleaner over the vacuum lines. The engine stalled out when I sprayed it on the PCV Valve hose, at the connection with the intake manifold. Tomorrow I am going to buy a clamp for that spot and put it on and re-test. I put a new hose on back in december when I replaced the PCV Valve, and noticed the hose was cracked.

Thanks for your help. I really hope this solves the problem.
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