help my car misses unless under a load

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Dec 28, 2008

#1

• Dec 28, 2008

• #1

95 cobra in my sig....i have replaced sparkplugs,wires,cap,button,pip,ignition module,timing set at 14,checked for vacumm leaks with starter fluid,mass air meter cleaned

whats next?

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Dec 29, 2008

#2

• Dec 29, 2008

• #2

no one has any input????????????????????

 

toyman

10 Year Member

Jul 19, 2007

1,944

54

79

Vernon BC

Dec 29, 2008

#3

• Dec 29, 2008

• #3

BaBysARM said:

no one has any input????????????????????

Click to expand...

Has the car been tuned/chipped? Does it miss at all constant speeds or in a certain speed range? Given all the parts replaced it sounds to me like it may be a tuning issue.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Dec 30, 2008

#4

• Dec 30, 2008

• #4

Run a cylinder balance test to narrow down which cylinder(s) is acting up.

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Dec 30, 2008

#5

• Dec 30, 2008

• #5

codes are 511,114,573,571,583,556
and cylinder balance test. 5-3-8
it has a mail order chip that was set-up with the old X-cam....but, when i first installed the 1087 cam it ran fine no drivability issues.

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Dec 30, 2008

#6

• Dec 30, 2008

• #6

heres the link to corral on the same subjecthttp://forums.corral.net/forums/showthread.php?t=1081406

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Dec 31, 2008

#7

• Dec 31, 2008

• #7

what size carb should i buy? and who wants my fuel injection?

 

Ih8losin

New Member

Jan 2, 2002

43

0

0

Dirty South

Jan 1, 2009

#8

• Jan 1, 2009

• #8

B4 you do anthing else swap out the coil. If you still have the stock coil throw it on there.

Hope that helps!

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Jan 1, 2009

#9

• Jan 1, 2009

• #9

tried that already....thanks for your help

 

Adam95GT

New Member

Aug 14, 2006

2,564

3

0

Burlington, NJ

Jan 2, 2009

#10

• Jan 2, 2009

• #10

BaBysARM said:

codes are 511,114,573,571,583,556
and cylinder balance test. 5-3-8
it has a mail order chip that was set-up with the old X-cam....but, when i first installed the 1087 cam it ran fine no drivability issues.

Click to expand...

how long was it running good for... my $$$ is still on tune... or something stupid like o2 sensors...

 

vladasap

Member

Apr 26, 2006

294

0

16

nyc, ny

Jan 2, 2009

#11

• Jan 2, 2009

• #11

u have the T5 listed in your sig and my buddies car used to do that after a tranny swap...he replaced the ecu with the same exact one (matching part numbers) and it stopped - no idea why but it helped

this probably doesnt help any but...

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Jan 2, 2009

#12

• Jan 2, 2009

• #12

Well right before i blew third gear out it had a slight miss.....so that night i changed the oil and cleaned the MAF. On my test run i tore the tranny out.....well i put a new one in and the miss has gotten worse, but it stops missing when it is under a load.....On saturday night i will unhook the O2 sensors and see what happens if nothing changes then i will take the chip out and go from there.

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Jan 4, 2009

#13

• Jan 4, 2009

• #13

i took the chip out, still has a miss. i put it back and unhooked the 02 sensor, still has a miss. I hooked them back up. what now?

 

Adam95GT

New Member

Aug 14, 2006

2,564

3

0

Burlington, NJ

Jan 4, 2009

#14

• Jan 4, 2009

• #14

coil??? edit: oops sorry just reread....


does it smell rich or anything... possibly its fuel related... filter clogged???

 

vladasap

Member

Apr 26, 2006

294

0

16

nyc, ny

Jan 5, 2009

#15

• Jan 5, 2009

• #15

i'd get under the car make sure you plugged everything up correctly under the car when you were doing the tranny (especially the 02's)
if not id really look into the wires and plugs (my car used to foul plugs and miss because i had oil rushing down into the combustion chamber due to a bad pcv valve)

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Jan 6, 2009

#16

• Jan 6, 2009

• #16

i swapped pcv valves with my 89 still no change.......the car is running extremely rich though.

 

BaBysARM

Founding Member

May 9, 2002

161

0

0

Hickory, NC

Jan 6, 2009

#17

• Jan 6, 2009

• #17

i'm going to put a fuel pressure gauge on it tomorrow. If thats not it then its going into the shop.