# 1991 f150 5.8 efi

**URL:** <https://community.cartalk.com/t/1991-f150-5-8-efi/100481>\
**Category:** Maintenance/Repairs\
**Tags:** ford, f150\
**Created:** [February 26, 2017, 9:28pm UTC](https://community.cartalk.com/t/1991-f150-5-8-efi/100481 "2017-02-26T21:28:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jdrkknight](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@jdrkknight](https://community.cartalk.com/u/jdrkknight)\
**Post date:** [February 26, 2017, 9:28pm UTC](https://community.cartalk.com/t/1991-f150-5-8-efi/100481/1 "2017-02-26T21:28:06Z")

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Truck runs for about 1 minute on a cold start. Then it seems to starve. I replaced both fuel pumps, fuel filter and fuel pump relay. I’m not sure where to go next. I’m not much of an auto mechanic, but I do make a living fixing machines and am familiar with automation. (I’m good with voltage and signal voltage.) so I would appreciate any help to point me in the right direction.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [February 26, 2017, 9:40pm UTC](https://community.cartalk.com/t/1991-f150-5-8-efi/100481/2 "2017-02-26T21:40:40Z")

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The next time the engine stalls, check for spark.

If there’s no spark, the problem might be with the Thick Film Ignition Module.

![](https://global.discourse-cdn.com/cartalk/original/2X/b/bb5e43e62342c75bc854f301604168c43485afc3.gif)

This module can be mounted on the distributor, or on the radiator core support under a rubber cover.

Tester