miata runs great then dies and stays dead
#1
Junior Member
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Join Date: Sep 2012
Location: grants pass oregon
Posts: 81
Total Cats: -25
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
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
#3
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.
-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.
#6
Junior Member
Thread Starter
Join Date: Sep 2012
Location: grants pass oregon
Posts: 81
Total Cats: -25
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
I did have a problem with CAS before I'm gonna regap it and start from there
#11
This sounds very familiar. When I first had my car running tryng to warm it up in grid I would known when the car was up to temp when it stalled when the fans tried to come on. That was back when the wires for the cam sensors were loose and the pins for the ignition coils were stretched out. And it didnt have the ground from the intake manifold to the frame.
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