someone please help me i am in desperate need of some advice. i bought a 1994 ram 1500 single cab short bed with a 360 5 speed it has 13" of lift on 38.5 tsl thornbirds. i have been trying to fix seince i bought it. it has a strange miss from 1000rpm to about 4000 at an idle it doesnt even so much as hickup it sits there and runs perfectly fine and even in neutral i can rev it out but as soon as i put it in gear and give it any gas it is just un driveable. this is what i have done. it started when i first bought it and he gave me money for a new motor so i threw it in and wouldnt you kno same thing. so i replaced the MAP sensor,plugs, wires, cap, rotor, throttle positioning sensor. some people say it could be the flywheel but um not confident enough to tear it out and replace it on just a whim. someone please atleast point me in the right direction...... Thank you all

 

could be the plenum, or a clogged cat. unplug you upstream 02 sensor and see if it runs any better

 

" ... even in neutral i can rev it out but as soon as i put it in gear and give it any gas it is just un driveable".

That just doesn't sound like a plugged cat. It sounds more like a weak/intermittent spark to me.

Try reading this thread and see if it sounds familiar:

https://dodgeforum.com/forum/2nd-gen...k-problem.html

My problem ended up being a failing crank sensor that wasn't allowing the coil enough time to build up a strong spark on certain cylinders. Most noticeable at lower rpms (like your "under 4,000"), and under load.

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"some people say it could be the flywheel ..."

Yeah, some people say we didn't land 12 men on the moon, too. Don't really see what the flywheel would have to do with a miss like that. That said, the flywheel was indirectly involved in my problem; the crank sensor wasn't reading the cut-outs on it very well, and was sending bad info to the PCM.

I hope you take a moment to check for a nice, fat, steady spark at the end of each plug wire. In an internal combustion engine, the value of a strong, timely spark can't be overstated.

 

Bang on the cat and see if it rattles inside.

 

I have previously experienced a #8 misfire, I banged on mine the other day while while I was under the truck, sounds solid as a rock. However I am aware that my plenum needs fixing.

 

It could be clogged solid. Or if it rattles, pieces are moving around inside and blocking the exhaust from exiting the cat. And/or expanding from the heat causing the blockage. Doesn't really matter, blown plenum or not. Dodge cat's are known to go bad.

 

Ah. Well, that just adds a couple MORE things I gotta fix. The joys of vehicle ownership.....

 

Well you already know your plenum is blown I guess.(sig) The longer you wait, the more damage is being done.

 

I know... Just the ways things are at the moment money wise, gotta do ball joints first, rather hurt the engine a little more then risk a ball joint breaking while driving down the road. It's not perfect either way, but it is what it is. And I'm really interested in changing to the Mopar M1 Intake, the Hughes AirGap is rather pricey. So gotta save up for that.

 

im no electrician i bouth the adapter to plug into the end of the plug wire to hook a mutimeter to it and alls i got was lit up trying to find what setting to put it on i will try to unplug the o2 sensor but the plentum would not make sence considering that i have replaced motors with diffrent plentums and the problem still exists.... so it has to be something other than the motor swap itself something that "bolts on" so to speak