# Engine running rough-missing **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [March 14, 2008, 2:09am UTC](https://community.cartalk.com/t/engine-running-rough-missing/11778 "2008-03-14T02:09:07Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![oldfart](https://avatars.discourse-cdn.com/v4/letter/o/d78d45/32.png) [@oldfart](https://community.cartalk.com/u/oldfart)\ **Post date:** [March 14, 2008, 2:09am UTC](https://community.cartalk.com/t/engine-running-rough-missing/11778/1 "2008-03-14T02:09:07Z")
1988 Ford F-150 4.9 liter 6 cyl. 5 speed manual trans. During the winter I noticed the engine was running rough for a while and then the ignition module failed and I replaced it. Now that the weather has warmed up it has started to run rough again. When I first start it up it seems to be running smoothly, but within the first one half mile it starts to miss and jerk. I have changet the throttle position sensor, but no help. There are several inputs to the EEC that are tempeture sensitive. Which should I suspect? ---
**Author:** ![oldfart](https://avatars.discourse-cdn.com/v4/letter/o/d78d45/32.png) [@oldfart](https://community.cartalk.com/u/oldfart)\ **Post date:** [March 29, 2008, 1:14am UTC](https://community.cartalk.com/t/engine-running-rough-missing/11778/2 "2008-03-29T01:14:33Z")
Well, I think I found it myself. Suspecting the engine coolant sensor, I disconnected it. Then started the engine. The engine now would definately not rev up when I step down on it. Plugged the ECS back in and after a warm up gave it the goose test. Seems to run fine now. Manufactures _ **NOTE** _ The EEC should have a manual reset.