95 dodge van, 2500. has a BAD engine miss, seems to smooth out when going up hill (giving it some gas) gets bad again when just going cruise speed..

3.6L gas(petrol) v6
3.0L diesel/???????????v8
never post lacking whats under that hood(bonnet)
or answers dead wrong or 100 pages long, wall of text;.
I will toss coin land on GASOLINE and USA spec car.
do not break the brakes. step yes break no. LOL

not clear at all what that drive-ability problem is , evidence not clear.
my guess weak engine , and not bad transmission
rpm rise but car speed does not change bad transmission
so is engine power lost. may be with violent engine misfire
or not at all just smooth power loss, like dragging a 10,000 lb dead weight,
well why not scan the cars PCM while it fails, using logging scanner or do it with 2 persons, one drives other scans. and see all those errors you are missing?
there are 3 causes (macro viewed)

• bad engine\ VVT failures? compression tests fails?
• bad spark if not diesel. (a tune up done at all in 10 years)
• bad fueling (mix) or bad fuel, bad filters ALL.

not clear at all
engine never fails parked, stalls or idle fails and dies.
car/engine fails only moving
or fails parked with foot attempting 2500 RPm in park ?
or up hills
or only one or more gears.
or in reverse.
does engine stall (RPM 0 zero)
?????????

bad tranny or rear end

Do you have a fuel pump? If its bad or weak, you aren't getting enough gas to your engine. Has anyone thought of the filter in your gas tank?

Hi tinkerbel925

Have you tried scanning it with a scan tool? If this much is going wrong there should be a check engine light on. This will tell you what is making your van do all that crazy stuff.

-hopeufixit-

may need to replace fuel filter.or could be an idle control sensor going bad. try running lucas fuel treatment through it 1st, it may only be a fuel injector clogging up, are you burning ethanol gas? i would go with fueling with good gas and adding the lucas fuel treatment !st before you do anything else. if that does'nt work then replace the fuel filter, if not that then i would replace the idle control sensor.hope this is some help to you!!

missing would show itself at low engine speeds.bad starting.or heavy load (going up steep hills)a miss at high speed would not be felt (normally)without other symptoms(lack of power etc)have you tried using higher octane fuel......mazda rec 92+ octane...

give it a tune up

fuel pump may be going bad have pressure tested on vehicle when warm also egr valve may be going bad or has bad carbon build up lack of power a miss will give u a trouble code[check engine] as well as egr valve and other emission parts but fuel pump usually does not

Have You Changed The fuel filter? Surging at higher speeds or cruising speeds, My guess is fuel filter.

i had the same problem happen to me. i had to change the injectors and the injector pump to solve the problem. i would check the lift pump first. when the engine is cold it hasnt had time to pressurize the line.does it restart and run fine when it is warm. if so i would change the lift pump. if not i would have a pressure test done on it. i hope this helps