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expert on mpfi ea81t needed
Posted 28 November 2011 - 09:57 PM
Posted 28 November 2011 - 10:46 PM
And I believe the engine is a EA82T.
Posted 29 November 2011 - 12:12 AM
Posted 29 November 2011 - 10:28 AM
maybe you should replace the coolant temp sensors ,as when it goes bad, the car is difficult to start when wam.
if it is a start then die, and no start again till it sits situation, there is a transistor on the coil bracket that can fail. the coil itself almost never fails.
the injectors would not dump excess fuel unless the car thinks its old when actually warm, check cts.
the fuel pressure regulator is after the injectors.
the fuel pump runs with the key in the start position, or when the car is running, or 2 seconds when the car is frst turned on.
Posted 29 November 2011 - 10:18 PM
Posted 29 November 2011 - 11:01 PM
Correct the engine timing first.
Posted 29 November 2011 - 11:06 PM
Posted 30 November 2011 - 01:11 PM
it is possible that some teeth sheared off the timing belt and caused the disty/cam to be out of time. This would eplain the compression numbers. The lower compression is on the disty side?
Posted 30 November 2011 - 08:52 PM
Cant dpo anything untill we have squish fixed really. We have suck, maybe boom.
Correct the engine timing first.
"Compression is 100,95,90,75 ." And the standard is 145 for this engine. I'm wondering if the excess fuel is washing down the cylinders. Probably is, but still, those numbers should be higher.
Posted 02 December 2011 - 06:47 PM
Posted 02 December 2011 - 09:00 PM
Judging ignition quality by spark colour is an old wive`s tale.
The length of gap it will jump is a better indicator.Spark testers w/an adjustible gap are useful.
In addition,the inline testers that connect to the plugs ground through the plug adding another variable to the mix.The type that ground directly to the block and have an adjustible gap are better,IMO.
Briggs and Straton say:
"A bright blue spark is best. A yellow/orange spark signifies weak ignition. Not true. Spark color determines virtually nothing. The hottest spark is ultraviolet which we can't see. Blue spark is cold in comparison to ultra-violet. Orange and yellow come from particles of sodium in the air ionizing in the high energy of the spark gap"
The ignition power transistors are normally all or nothing.
The injectors might be letting an excess of fuel dump in the cylinders.
Might be leaky injector(s),(does the fuel pressure hold after shut down?),
bad MAF,TPS or CTS.
I would try starting w/each of the above disconnected alone.
Dry the plugs each time.
Those compression #s are pretty bad.I think it should still run though.
Posted 03 December 2011 - 11:02 PM
Posted 04 December 2011 - 11:57 AM
you should go through the timing belt procedure and check all that before determining spark or fuel timing, especially since you have compression numbers to prove something is not normal.
search this forum or the intenrnet for 'timing belt procedure' and you will find the write-up
Posted 04 December 2011 - 03:16 PM
Posted 06 December 2011 - 10:39 PM
Posted 09 December 2011 - 11:01 PM
Posted 09 December 2011 - 11:50 PM
the difference between an spfi and an mpfi disty is the spfi has a round shaft, and the mpfi has a d shaped shaft, and the mpfi has a taller cap and rotor. and spfi rotor and cap will fit on an mpfi disty, but not the other way around
Posted 11 December 2011 - 03:19 PM
Posted 17 January 2012 - 09:28 PM
Posted 17 January 2012 - 11:35 PM
nice hit, good score. so you still driving it?
Turned out to be a bad disty cap. Was recently purchased but went bad within 6 months!
i had a new rotor fail (on an XT6 - same rotor as EA82T maybe) after a couple weeks/month too. the end of it just came apart...guess it too could have been disty failure if it was causing the rotor to tear up - but i seem to recall the rotor looked like the failure point.
Posted 17 January 2012 - 11:57 PM
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