Car has poor acceleration

**3.9LMustang** · 03-01-2010, 12:59 PM

Need some opinions. My stang has poor acceleration from a stop. When i barely tap the gas it doesnt go anywere, i have to give it at least or more than half of throttle for it to go and when i does it takes up to 2000 rpms for it to get the move on. After it goes past 2k it shifts good threw all the gears. Also whenever i footbrake it, the rpms dont go past 1100 rpms

this is even whenever i have the gas pedal to the floor and whenever i let the brake go it does the same thing as stated above about the rpms. Also, i have the little screw on the throttle body a little bit down because if i were to pick it all the way up, my car would just turn off

i have done these things and still nothin.

1. replaced the fuel filter
2. check the plugs
3. check the wires.
4. test the ignition coil pack
5. cleaned out the egr valve
6. timing is good
7. Fuel pressure good

other things that i need to do.

check the TPS
clean the MAF (going to do right now)

There is no check engine light on ethier

**slowpoint0** · 03-01-2010, 01:55 PM

Yep, My next step would be to check the voltage at the TPS. I am not sure what it is for a v6 though.
Also I am assuming it is an AOD. Does it do it in drive only? Can you manually put it into first and does it do the same as stated?

**3.9LMustang** · 03-01-2010, 02:00 PM

Originally Posted by slowpoint0

Yep, My next step would be to check the voltage at the TPS. I am not sure what it is for a v6 though.
Also I am assuming it is an AOD. Does it do it in drive only? Can you manually put it into first and does it do the same as stated?

hummm hadnt tried that

let me try it on all the gears

**311-420** · 03-01-2010, 02:53 PM

Sounds like some clogged ass cats or bad loss of compression.

I see you're using an offroad pipe. Won't be cats...

Are you getting blue smoke out of the exhaust?

**3.9LMustang** · 03-01-2010, 03:11 PM

Originally Posted by 311-420

Sounds like some clogged ass cats or bad loss of compression.

I see you're using an offroad pipe. Won't be cats...

Are you getting blue smoke out of the exhaust?

nope

**mach1r** · 03-01-2010, 03:59 PM

u hearing any pinging or knocking of anykind coming from the engine?

**3.9LMustang** · 03-01-2010, 04:36 PM

well i pulled some hoses from the egr bypass tube. Both hoses were cracked or torn, whatever you call it. I blew threw them, holding my finger on the other side and no air was coming out of the tear. I even used throttle body cleaner to see if it would leak threw the tear but no dice. Those hoses are probably still good if nothing came out threw the cracks

should i still get them replaced ?

Also it seems like the engine is miss firing because the engine is running a little bit ruff at idle. But i already checked all the plugs and wires and they are all good. Firing order is good too..Maybe motor mounts are bad? could probably cause the way the engine is shaking but i know not the poor acceleration :p

Originally Posted by mach1r

u hearing any pinging or knocking of anykind coming from the engine?

no sir

**drewskie68** · 03-01-2010, 05:48 PM

you're missing 2 cylinders

jk, just wanted to be the one to put it...

**3.9LMustang** · 03-01-2010, 05:52 PM

Originally Posted by drewskie68

you're missing 2 cylinders

jk, just wanted to be the one to put it...

yes i have been told that b4 and im thinking about getting that 2 cylinder bolt on kit

**drewskie68** · 03-01-2010, 06:36 PM

werdddd^^ although with that blower you'd be beating me easy

**3.9LMustang** · 03-03-2010, 11:54 AM

i also replaced the egr bypass tube hoses and nuthin happend

the only thing to do is mess with the TPS

after that i have no idea wat it could be

Originally Posted by slowpoint0

Yep, My next step would be to check the voltage at the TPS. I am not sure what it is for a v6 though.
Also I am assuming it is an AOD. Does it do it in drive only? Can you manually put it into first and does it do the same as stated?

ok i tried that and it does the same thing

**311-420** · 03-03-2010, 07:33 PM

I know you said you checked the plugs, but do it again. lets hear what they look like after you get them out. even better would be pics.

**l_shizzle_l** · 03-05-2010, 01:51 PM

Are you running a tune from Justin at VMP? 87 89 or 91 octaine?

**Matt56** · 03-07-2010, 02:38 AM

could be a tps problem like a break in the wires or a faulty tps at that, im not sure what the voltage should be if your a memeber on v6power.net im sure they can help you out a ton

**3.9LMustang** · 03-07-2010, 04:33 PM

i think we figured it out already. Its the MAF or the wiring. Because we pulled the MAF sensor off and my car was idling the same. Nothing changed at all but we are going to do a few more testing on the MAF to see if its it

Originally Posted by 311-420

I know you said you checked the plugs, but do it again. lets hear what they look like after you get them out. even better would be pics.

ive tooken out the plugs like about 4 times and everytime i take them out they are white

Originally Posted by l_shizzle_l

Are you running a tune from Justin at VMP? 87 89 or 91 octaine?

nope, i got dyno tuned in the valley

Originally Posted by Matt56

could be a tps problem like a break in the wires or a faulty tps at that, im not sure what the voltage should be if your a memeber on v6power.net im sure they can help you out a ton

that was my next step to do..the tps

**blk01gt** · 03-09-2010, 12:36 AM

ashin white? thats lean mix

**JCP281** · 03-09-2010, 05:38 PM

I notice your car is an auto, maybe your torque converter is going bad. you said you have to give it about 2000 rpms for it to go. Just a thought

**3.9LMustang** · 03-09-2010, 05:46 PM

Originally Posted by OpenTrackGT

I notice your car is an auto, maybe your torque converter is going bad. you said you have to give it about 2000 rpms for it to go. Just a thought

i wish i could say that but i just replace my trans/tq converter and it was doing the same thing b4 the transmissions swap

**311-420** · 03-10-2010, 03:04 PM

White plugs r not what u wanna see. If the cars not gettin fuel, it's gonna run like doody

**court** · 03-19-2010, 06:58 PM

hey i went to the san antonio raceway last week for the first time, i had pretty good reaction times off the tree, but after i would take off i noticed my car would almost "die out" for lack of a better work and then it would go nice and strong to the finish.. if you know what i'm talking about is it just the way i'm driving?? or is it the car??

and what time should a "mostly stock" v6 mustang be running in the 1/4 mile

**3.9LMustang** · 03-19-2010, 11:23 PM

Originally Posted by court

hey i went to the san antonio raceway last week for the first time, i had pretty good reaction times off the tree, but after i would take off i noticed my car would almost "die out" for lack of a better work and then it would go nice and strong to the finish.. if you know what i'm talking about is it just the way i'm driving?? or is it the car??

and what time should a "mostly stock" v6 mustang be running in the 1/4 mile

well my 95 auto, ran like a 17.3 with only, BBK Underdrive Pulley Kit, Aftermarket CAI, 2.5" True Dual Exhaust w/o Cats & w/xpipe as my major mods

and this other stang 98 v6 ran a 16.6 with only True Dual Exhaust BBK Cold air intake
(but there is a difference from the 94-95 and the 96-98 v6 stangs. The 94 and 95 came with only came with 140hp to the crank while the 96-98 v6's came with 150)

**3.9LMustang** · 08-23-2010, 11:03 AM

problem solved

OEM Balancer cracked. Whenever i took off the balancer, some of it was still on the crank

thanx to all that helped

New and Old Balancer

**l_shizzle_l** · 08-23-2010, 10:37 PM

glad you got it fixed. if you can make it out on wed. night this week me and a couple other v6's are gonna be out there you should make it.

**raymond8698** · 05-19-2011, 01:15 AM

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