Need some help!

[dg1653]

I have a 1995 F250, 97k. My FICM is 48.5-49.0, fuel pressure is 55-60 psi, 5w40 T6 with Rev-x. Now on to my problem. My truck misses at idle generally worse with the truck in gear and at a stop. It doesn't matter if the truck is hot or cold. There is no miss while going down the road, no smoke, and no lack of power, no CEL. Generally if an injector is going bad it will smoke a little, or have a lack of power, and you can feel a miss while driving down the road right? My ICP and IPR shows 22% and 580-600 respectively at idle. What else could cause this condition? Thanks.

[HAM_RADIO_MAN]

The best way to tell if you have an injector laying down on you is to do a cylinder contribution test. Any trouble codes?

[dg1653]

How do I do a cylinder contribution test?

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[HAM_RADIO_MAN]

You will need a more advanced scan tool or a software package for your computer called autoengienuity. Sometime the PCM will have a code for a specific cylinder that has a contribution fault.

[dg1653]

How do I check for trouble codes?

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[HAM_RADIO_MAN]

Dude, use your scan gauge.

Your can even program an x gauge into it to count cumulative cylinder mis-fires.
You will have to get the directions and read up on how to do it. You can search for scan gauge x-gauges for the info to program into the Scangauge. Is it a SG2

There are a few codes your Scangauge will not show ,but you what you are doing it will work great.

[dg1653]

Well hell I thought you was talking about some other kind of code...I don't have any trouble codes and I have the cumulative cylinder mis-fire gauge on my scan gauge and they never show a mis-fire.

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[dannyboy950]

Time to put a real scanner on it to see what is going on.