It's been several months with the EGR vacuum line unhooked. The engine light is on all the time once it warms up, but the truck is still running great. Moisture or corrosion on the pickup in the distributor might cause a slight bump in the idle, but I have noticed that regardless of how new the TPS is, most trucks will still have a stumble when cold, or at low RPM with a full draw on the Alternator. Tell us a little more about your problem, the symptoms, and we might be able to figure out a quick fix or test to find the problem. The only bad news I have is that I've been through 2 windshields on the winter roads here in NY.

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1993 F-150 4x4, 4.9L, Superwinch, K&N, Gibson 3" SS Single, Eclipse 5440 Indash CD, Kicker Impulse i-270 Amp, Kicker Solobaric 10" Sub, (4) 5-1/4 Eclipse 8953, Midland Weather Max II CB

1993 Procraft 180 Dual Pro Basser, 18' 9", 150-HP XR6, Hummingbird 400-TX

1999 Kawasaki KDX 220, Boysen Rad Valve, FMF Burly Pipe, FMF PowerCore II Silencer

Play Hard or Step Back!

 

I'm going to try some of the suggestions in this thread, but the problem I'm having seems slightly different. My '93 F-150 4.9 manual, accelerates well, but at the top of second starts to miss. The miss is noticeable in third, fourth and OD, but the truck idles and starts perfectly. When it first started I thought a tire had gotten out of balance because I didn't hear or notice a miss when at low speed. The miss started suddenly not gradually, and hasn't disappeared. I replaced plugs, cap, rotor and wires, still misses. There is also a "roar" when at high RPM. Any suggestions or comments would be appreciated.


[This message has been edited by richard1572 (edited 04-09-2001).]

 

charliephogg,
Let us know how long it lasts. Mine has started the hesitation again and my next step is to clean the valve.