Hey guys im new here and i got some troubles with my 94 f-250 5.8L. It seems to be cutting out and hesatating when it is in a higher gear or lower RPM. By the way its a 5 speed manual. It all started when i washed it underder the hood cause it was pretty dirty. When it cuts out it feels like the clutch is almost slipping but its not. it has to be an electrical problem. I replaced the cap and rotor and it started running almost perfect again. I checked my plugs and wires. they were all fine and just replaced about 6 thousand miles ago. If you guys got any ideas fast replys would be great! thanks

mackwish

 

fast replies cost extra.

The TFI module could have a small crack in it and water got into the module torturing the minimal electronics inside.

Same for the connector to the ECM on the driver side firewall. There's a gasket there to protect the ECM from moisture, but old gaskets don't particularly like hoses.

Could be any of the connectors on the sensors, also leaked, and water got inside the "weatherpack" causing a short or an inaccurate reading of the sensor. The sensors themselves can get wet, no problem, just not the connectors which is why they have seals on them (which in an 11 year old truck might be marginal).

 

thanks man i appreciate it. ill take a look at it!!

 

Blow all the connectors (each half) with an air compressor with a nozzle. If you don't have one, your local service station has one for sure and if you have a good relationship with them they'll swap off the tire filler thing for a nozzle for ya and let you blast your connectors.

Note that all of the weatherpack connectors should have an electrical grease in it, which helps keep the moisture out when the gaskets on the connectors fail (which they all do eventually).

It's a fun way to spend two hours. Over the summer I refitted every connector under the hood with new gaskets and new electrical grease I got at an autostore. I forgot the name of it or I'd give it to you.

While I did all my connectors over, the problem ones for me was the O2 sensor and the TPS sensor. When either got wet my truck got a bit unhappy. Especially with the TPS connector.

 

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