miata runs great then dies and stays dead
I have a 2001 vvt miata BP4W
Custom t28 kit 550 cc injectors 2.5" downpipe BOV recirculated AEM FIC Boomslang Harness AEM UEGO It was running great on freeway one day then I get on my road and it starts bucking and hesitating. Next day checked spack plugs- Fine Wires- Fine Jumped f/p and ground terminals and fuel pump runs Cleaned MAF sensor Regapped plugs Tightened all hose couplers and checked for bad 02 wires found nothing My MAF voltage isn't fluctuating abnormally my wideband is reading 14.7:1 when it cranks. Checked and tightened all bolts and lines. Found that I didn't plug my egr connector in. Plugged it in changed nothing. Cleaned MAF again. Starts and runs OK little rough but OK. I pull into drive way. Shut it down and it starts up and it runs fine till I hold it at 3k rpm and it starts missing. Today won't start I'm pulling my hair out on this one Any suggestion s would help |
If you think you're getting fuel, check for spark and things that help deliver spark signal.
Maybe it jumped timing manually? Is it just turning over, or coughing back through the intake? |
If your WBO2 is reading 14.7:1 when the car is cranking but not running, then your WBO2 is broken.
-or- It hasn't heated up yet -or- It's not getting correct voltage -----bottom line------ A WBO2 reading when your car is cranking is of no value. Can you get the car to start at partial throttle? Definitely have a friend help you check for spark. I suspect joe may be on to something in regards to being possibly mistimed. Another possible culprit may be a CAS giving out when it gets warmed up. |
Check the gap on the crank sensor
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Check your cam sensor. If it has the mitsubishi symbol on it, its ones of the shitty ones and might be the problem.
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It coughs and stumbles while cranking. I I can't hear it cough through intake but it makes engine shake like crazy. It has a brand new timing belt in it only 3000 miles on it.
I did have a problem with CAS before I'm gonna regap it and start from there |
And WB02 reads 14.7 at idle not cranking sorry missed typo
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So figured out when my car wants to die it drops voltage from 14 volts to 11 volts then goes back to 14 volts then engine recovers. Alternator or battery?
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That's at the battery
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Car idles great till both fans kick on. fans unplugged it drops voltage under load
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Originally Posted by kman456
(Post 1088525)
Car idles great till both fans kick on. fans unplugged it drops voltage under load
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Found the problem.....cat is shot
Found element chunk blocking exhaust port. Unbolted cat runs great now |
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