91 f250 runs bad when hot out

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91 f250 runs bad when hot out

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Ford Forums >> Ford Trucks, Ford Vans & Ford SUV's >> Ford F-250 & Ford F-350 >> 91 f250 runs bad when hot out

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91 f250 runs bad when hot out - 6/16/2005 2:34:45 PM

zacfrd

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i have a 91 f250 with a 351 with an e40d trans when truck gets hot she is a real dog. dose this truch have a mass air flow sensor also what parts on this truck affect the fuel mixture?? trans shifts good but when warm seems like no torque and engine lacks power please any sugestions would help

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RE: 91 f250 runs bad when hot out - 7/8/2005 3:36:11 AM

grampztoyz351

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There is no mass air on your truck,but does it sound like it's missing after it warms up. The TFI module could becausing your problem. AutoZone and some of the other parts stores should be able to check it out.

(in reply to zacfrd)

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RE: 91 f250 runs bad when hot out - 7/8/2005 9:08:35 PM

cctxfish

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I don't think AutoZone does preOBDII. Maybe a fuel filter and tune-up may help, but think your going to need to manually test all the sensors. If engine light is on check the code

(in reply to grampztoyz351)

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RE: 91 f250 runs bad when hot out - 7/9/2005 1:29:17 AM

grampztoyz351

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They've got the equipment to check the modules but you have to take it off and take it in.I tested a many of them when I worked for em. The test equipment should be located near the battery testers.

(in reply to cctxfish)

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RE: 91 f250 runs bad when hot out - 7/11/2005 10:03:51 PM

cctxfish

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will thats good to know, may have to check them out myself with some good sensors first

Also he still will need to clear codes if check engine light was on.

(in reply to grampztoyz351)

Post #: 5