Topic: loss of power while driving my 91 v6

[CLANK84]

like when im driving down the freeway with the pedal to the floor you can actually feel the truck slow down for a little bit then take off again????any help???

[Cheesemaker]

When was the last time you changed fuel filter?
Checked your oil for water?
Any check engine codes?

[twistedtoy92]

X2 Basics first! Air, Fuel, Spark, Compression, Fluids....

[GONZO97]

every now and then mine will do something similar its quite odd, the engine will actually shut off check engine light will go on then itll roar right back to life, i have no idea why it does it but it does every now and then, and its very hard to diagnose because it happens more randomly then consistantly

[chromewontgetyouhome]

Standard or auto?  I'm getting some clutch slip with my 22re/w56, revs stay the same but the truck slows down enough to have to down shift to keep going.  I can feel a slight "buck" while under load sometimes too, time for a Marlin clutch upgrade!

[CLANK84 [OP]]

my truck is standard. no oil in water, new filters, wires, plugs, cap ,rotor. no lights come on you can just feel if start falling on its face then all a sudden runs fine again. im stumped on the issue...

[twistedtoy92]

fuel pump maybe

[CLANK84 [OP]]

well im in the process of doing a axle swap on my truck and during the down time ive replaced everything i think it could be causing my loose of power... whats your thoughts on one of those off brand intake set ups? guess ill have to wait a few more days to see if replacing everything helped... thanks for the input

[CLANK84 [OP]]

loss*

[Snowtoy]

every now and then mine will do something similar its quite odd, the engine will actually shut off check engine light will go on then itll roar right back to life, i have no idea why it does it but it does every now and then, and its very hard to diagnose because it happens more randomly then consistantly

My '90 3.0 did the same thing back in '96-'97.  It took damn near 10k miles and 2 unsuccessful trips to the dealer before it registered a code.  It ended up being a the speed sensor in the speedometer.  It was telling the ecu that I wasn't moving, so the ecu shut everything down.