raun31

on my 93 max im having some problems with my acceleration....i had replace the fuel sending unit which has fixed my problems with starting the car without starting fluid but now when i put the car in D it will take off like somebody barely touching the gas pedal but i would have to stomp the gas pedal to the floor in order for the car to move good but i would like any help or advice on what to check or replace thanks....would a bad o2 sensor cause this

Hectic

iTrader: (20)

I assume you mean you replaced the fuel pump. The sending unit is just a level sensor for the fuel gauge.

Is there an engine miss? How well does it rev when in neutral? If everything is fine in neutral, I'd say your transmission is stuck in a high gear.

raun31

when in park or neutral it idle smooth but as i put the selector down to D it idle a lil rough but it barely pull unless i floor the gas pedal

shiloh51933

iTrader: (5)

As mentioned sounds like tranny is slipping,have u checked trans fluid level and serviced the trans fluid? I'd start there with drain/fills and add 1 bottle of "Lucas tranny fluid treatment ".

raun31

so u think its the transmission

shiloh51933

iTrader: (5)

You've given only little bit of your symptoms but if in P or N she throttles smoothly through all rpm ranges, then you could have A/T issue. Have you tested you fuel/ignition systems yet? Have you checked you PCM/ECM for trouble codes yet?

raun31

my ecu gave me a code 55 which mean everything ok

Laevateinn

iTrader: (3)

1. Check your accelerator cable tension.

2. When in D, and stopped in a level surface, does it roll forward? Does it shift into all gears? At what RPM does your car move forward from a complete stop? Try pressure checking your transaxle if you can. Drain your ATF, drop the pan and visually inspect the fluid color under the sun. If it's kinda purple and sparkling (or a noticeable silver line), the fluid has overheated and you have massive shavings from the gearsets. Check for flakes as well because when the fluid was overheated, the paper friction material from the clutches flake off. Check the magnet as well for bits or anything.

raun31

i thought the pan was on top of thesse transmissions

Dhunterx

iTrader: (6)

It could either be a roasted transmission (very likely) or the transmission computer is toast (not likely, but it happened to me). As mentioned above, see how the car rolls forward on a flat surface with the car in D. Try shifting it down to 1. If it rolls better, it could be the computer that crapped out. The car goes into a fail-safe mode and keeps the transmission stuck in 2nd.

Laevateinn

iTrader: (3)

I've seen pans on the side but not on top of a transmission.

I've overhauled a 41TE from an 02 Chrysler T&C that went to "limp mode" but it has the MIL illuminated. Is it the same for OBD1s?

maximo018

iTrader: (6)

It is on the top for the 3rd gen auto trans.

Laevateinn

iTrader: (3)

Oh I see. Mine is a VE so it's at the bottom.

Dhunterx

iTrader: (6)

Don't think so. I knew something was up with mine when the light for the power/comfort switch wouldn't turn on. The bulbs were fine too.

maximo018

iTrader: (6)

Yeah I meant to say VG auto

raun31

well my transmission fluid is full and look good(no shavings) somebody had told me that its something due with my air ratio any advice

maximo018

iTrader: (6)

Have you bothered checking out your throttle position switch? Only thing with a electrical hook up located on the throttle body.

raun31

naw i havent do you think that i need to change it or do i have to take it to the dealer to have them reprogram something

CMax03

iTrader: (3)

TPS is off.....

maximo018

iTrader: (6)

Lol. Man the dealer isn't gonna be able to reprogram anything for these cars. Hell I don't think theres anything that can be reprogramed. All you do is go to either Rock Auto or Courtesy and order a new one. Theres only 2 screws holding it in. PAY ATTENTION TO WHAT POSITION ITS IN WHEN YOU REMOVE IT! The thing is very sensitive if its off just a bit so put the new one back exactly where the old one came off from. Then crank her up and see what the verdict is. This should fix the issue. I had the same thing and did this. My late throttle response/ hesitation issue was resolved.

LvR

Do yourself a favor and work through Wiking's excellent writeup here