Quote:
Originally Posted by pshovest
I would check fuel pressure at rail w/gauge and not depend on pressure sensor. Harbor freight has a $30 fuel pressure tester.
Odd that engine doesn't run w/starting fluid if you have spark. Are you spraying for at least 5 seconds while cranking?
90 psi is low compression. Is engine flooded? Are plugs wet w/fuel? Is there any fuel odor at all on plugs? A flooded engine will wash oil from cylinder walls and reduce compression.
Scan for errors with ISTA and post.
Run ISTA test plan for codes.
An intake leak that causes air to bypass the MAF will prevent DME from injecting the correct amount of fuel and can prevent starting. Remove all ductwork between throttle body and MAF and inspect for leaks/cracks.
Engine will run w/o MAF. With ignition off, disconnect MAF and try to start.
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Thanks for the reply! I’ll pick up a pressure tester tomorrow.
I tried the starting fluid before checking spark, I fully expected no spark and was somewhat surprised to see a strong, blue spark. Why doesn’t it ignited the starting fluid? I would think even if it were out of time it would backfire or something unless the starting fluid is going in the intake valve and straight out the exhaust valve.
I thought 90 psi might be a little low but the engine is high mileage. (It may be further evidence of a jumped timing chain).
The plugs are black and smell of starting fluid. I couldn’t detect any raw fuel.
I inspected the air ducting when I replaced the MAF sensor, it appears fine.
After clearing codes from the run down battery, nothing of consequence came back, just fog sensor and no communication with TEL/MULF.