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Guest Message by DevFuse

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spfi slight hesitation problem

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4 replies to this topic

#1 bushbasher


    exhaust fume addict

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  • Sooke B.C. Canada

Posted 25 December 2003 - 10:36 PM

If you punch it with the spfi it will hesitate for maybe a second and then rev up, it will also hesitate slightly at low rpm under load. The check engine light flashes. However there is a green connector in the engine bay right in the top corner by the strut, which stops the check engine light, but causes the engine to hesitate a bit more severely, and idle a bit lower. Any ideas?

#2 MilesFox


    Catch this Fox!

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Posted 26 December 2003 - 12:59 AM

jims wagon did that, and it turned out to be a bad filament on the MAF

you can take the module off the maf body to check it out'

you might need dielectric grease(like for ign module) to put it together, not sure

#3 86subaru


    Elite Master of the Subaru

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  • ohio

Posted 26 December 2003 - 08:51 AM

yes miles was right ,but it still runs pretty bad , but the hood was off of it for aleast 6-7 months before i bought it :(

#4 mattoh130


    New User

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Posted 27 December 2003 - 09:04 AM

MAF body. What, where?

#5 jimkup


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Posted 29 December 2003 - 10:39 AM

My '88 DL Wagon did the same thing, EA82 SPFI, w/220K miles. I checked the TPS (Throttle Position Sensor) for a dead spot, but nothing major, just a small dropoff in resistance when just starting accealeration. Eventually did a compression check & found #3 cylinder with only about 65psi. All others around 150psi. Replaced both hydraulic lifters on that cylinder & much better now. Also, gas mileage was fluctuating & dropping radically before, but now getting 27 - 30 mpg consistently.

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