Mechanics

DOES NOT START

1998 Mazda b2500 • 175,000 miles

Has fire has injector pulse has air has fuel has fuel pressure timing is on has compression does not start no codes no security fault
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Kevin Godwin
December 23, 2011.




Done all the above (basics) still nothing even tried a used computer like stated in post above has fire has injector pulse has fuel pressure and timing is dead on. No codes or security faults

Tiny
Kevin Godwin
Dec 23, 2011.
How did you check the timing that is dead on-also what is the fuel pressure?

Tiny
Rasmataz
Dec 23, 2011.
Pulled the timing cover off and checked cam and crank marks
fuel pressure 35psi
injector pule and pulse width looks great as well

Tiny
Kevin Godwin
Dec 23, 2011.
Are you so sure its on the compression stroke instead of being in the exhaust stroke-180 deg off-

Tiny
Rasmataz
Dec 23, 2011.
Yes and truck has cranked and ran perfect once since problem did not recrank rechecked everything though still found nothing wrong all numbers look good all sensors read good all waveforms are good

Tiny
Kevin Godwin
Dec 23, 2011.
You got compression, fuel and spark it should be able to combust I can't think of anyting else
AD

Tiny
Rasmataz
Dec 23, 2011.
Thats what I thought too but

Tiny
Kevin Godwin
Dec 23, 2011.
Something is still amiss between the 3 elements

Tiny
Rasmataz
Dec 23, 2011.
I agree but I can hook a compression gauge and fuel pressure gauge a noid light and a spark tester all at the same time and everything is there even tried and egr valve thinking maybe its stuck open letting to much (used) air into combustion chamber to run.

Tiny
Kevin Godwin
Dec 23, 2011.
EGR valve could be wide open creating a massive vacuum leak

Tiny
Rasmataz
Dec 23, 2011.

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