1990 Honda Civic Stalling above idle

TNTMARINE

MEMBER
1990 HONDA CIVIC
1.6L
4 CYL
2WD
AUTOMATIC
200,000 MILES

Engine stalls above idle unless throttle is pressed SLOWLY. It acts like a carb. Vehicle with a bad accelerator pump. I have replaced fuel pump, fuel filter, pressure regulator, O2 sensor, distributor cap, rotor, spark plugs. No codes flashing on dash or ECU.

8 Replies

WRENCHTECH

MECHANIC
20,757 POSTS

Those symptoms are characteristic of either low fuel pressure or a bad Mass Air flow sensor. I would certainly take a pressure test before assuming that is good.

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Wednesday, December 17th, 2014 AT 1:32 PM

TNTMARINE

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5 POSTS

Thanks for the answer. The car runs fine at high RPM 2500 or more, but stalls just above idle. Will check the MAF sensor. I might have more questions. Thanks again.

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Wednesday, December 17th, 2014 AT 8:53 PM

TNTMARINE

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5 POSTS

Upon inspection of my 1990 Honda Civic EX, I don't find the MAF sensor located in your photo. Where is it? Thanks.

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Wednesday, December 17th, 2014 AT 9:25 PM

WRENCHTECH

MECHANIC
20,757 POSTS

You're right. I checked and in this year they used a MAP sensor instead of a MAF. That still could be the issue but some scan tool testing would be necessary first.

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Thursday, December 18th, 2014 AT 2:10 AM

TNTMARINE

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5 POSTS

Thanks for the reply. I have located the reference to the MAP sensor in my Chilton manual #30200, page 4-31, Figure 60, but no picture of where in or on the engine the MAP is located. Do you have a picture or description? Thanks again.