Question about 1990 Ford F350

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Truck running funny sometimes and other times running perfect.

I have a 1990 F-150 5.0L 4x4 with 155,000 miles that has an issue. A couple years ago I had my fuel regulator replaced because it was running crappy. Now it runs good sometimes and others it seems to have power loss and miss or chug. It fires right up every time and idles good but I can smell a lot of fuel when I sniff by the engine even with the hood closed. What to do other than replace fuel regulator and check fuel pressure? It also has a new fuel pump, filter and spark plugs.

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It sounds like you really take care of your truck,But being that it is a 1990 with the mileage you stated,The only thing that comes to mind about your problem,
Is the rubber "O" rings that seal the injectors,They are probably not soft anymore and that might be where your smell is coming from.this could also be your light miss or chug too,But if you do check them for hardness,really check the injectors over before you reinstall them,check the screen on the bottom to see if any rust particles are trapped in there from the fuel tank and lines.

Posted on Dec 11, 2009


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