missing during acceleration

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Feb 16, 2005 | 12:25 PM

FRDPWR

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missing during acceleration

Hi guys,

New to the board

92 Ranger 4x4 4.0 auto and yesterday my son said it started missing real bad when he is getting on the interstate and this morning when he first took off the thing wouldn't get above 35 mph and was missing real bad but once he drove it about 5 miles it ran better but still misses under acceleration. It also has always pinged real bad. He changed the fuel filter yesterday but no help. The plugs were replaced about 4000 miles ago. He's bringing it over tonight so I can pull the codes and I was wondering if someone could tell me some other things to check.

Thanks

Feb 16, 2005 | 01:55 PM

Psychopete

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From: Fort Wayne, IN

Quote:

Originally Posted by FRDPWR

I think you're on the right track on scanning the codes. Usually pining means that the motor is running too lean.

Pete

Feb 16, 2005 | 03:05 PM

FRDPWR

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After reading some of the posts on here, I had my son clean the mass air and after a brief test drive he said it was fixed. I guess the real test will be when he gets out of school and hits the interstate.

thanks

Feb 22, 2005 | 11:38 AM

FRDPWR

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*Update*

After driving around this weekend I ran the codes and came back with zero, the truck runs better than it has in a long time.

Thanks to the board