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 '92 MX-3 Precidia K819 hesitates on acceleration 
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Joined: August 18 2016, 2:47 PM
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Post '92 MX-3 Precidia K819 hesitates on acceleration
'92 MX-3 Precidia K819 hesitates on acceleration. Engine feels really great until sudden loss of power kicks in while roughly accelerating.
On engine I've done so far:
*replaced ignition parts from coil to plugs
*replaced all vacuum hoses
*replaced all filters-fluids in engine
*cleaned clogged EGR tubing in IM
*replaced EM gasket
*welded exhaust tight
*taped air duct cause it's quite cracked
*adjusted TPS, ignition timing, idle
*checked for air leaks
*checked VRIS actuators
*replaced temperature sensors and cooling caps

There are no diagnostic trouble codes saved in memory. Car runs rich as far as I could say from the smell of gas that comes from exhaust and by spark plug carbonization. I have noticed oil in air duct and IM, exhaust is smoking. I haven't measured fuel pressure so far, checked lambda sensor or catalyst. I'm using online manual for trobleshooting.

Hope to get some good advice.

Raul

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August 18 2016, 5:03 PM
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Joined: August 18 2016, 2:47 PM
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Post Re: '92 MX-3 Precidia K819 hesitates on acceleration
Made a couple of videos to give you a better idea of the problem I have:

https://www.youtube.com/watch?v=r2AtuCOmrYI
https://www.youtube.com/watch?v=8uaRXuhPyM8

Also I measured cylinder pressures. By manual the normal pressure of a cylinder should be between 10.0 to 13.6 kg/cm².
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Spark plugs were again a little carbonized. Soldered in additional ground for emission canister purge solenoid valve, so that's gonna be working from now on too. Didn't make it to measuring fuel pressure yet, going to do that today or tomorrow. PCV is good, tubing is ok, still there's oil in intake duct and IM.

Raul

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August 20 2016, 8:24 AM
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Joined: August 18 2016, 2:47 PM
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Post Re: '92 MX-3 Precidia K819 hesitates on acceleration
Problem was solved by swapping the fuel pump.
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September 10 2016, 2:47 AM
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Joined: October 17 2004, 2:01 AM
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Location: SLC, Utah
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Post Re: '92 MX-3 Precidia K819 hesitates on acceleration
Nice job on making the video.

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April 02 2017, 11:14 PM
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