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What are the main causes for running rich?

  • Thread starter Thread starter RoushTbird
  • Start date Start date Nov 24, 2008
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red dragon95

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Aug 13, 2008
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north las vegas
Nov 25, 2008
#21
  • Nov 25, 2008
  • #21
if your car wont stop priming the pump then thats sounds like the relay for the fuel pump is bad or maybe the ground for it is bad.its under the front seat,driver side.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
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Nov 26, 2008
#22
  • Nov 26, 2008
  • #22
I like 2002BLGT's thoughts for the miss. On the no-spark wire, also consider the wire being bad. Ohm it out, swap on a spare, or switch it with another similar-length wire (to see if the miss follows the wire).

Chythar has you covered on the purge solenoid.

Be sure to atleast seal the hoses if there's an issue - otherwise you have a manifold vac leak.



red dragon95 said:
if your car wont stop priming the pump then thats sounds like the relay for the fuel pump is bad or maybe the ground for it is bad.its under the front seat,driver side.
Click to expand...

On an aero foxes through about '91 this is true. On 94-95's, it's in the CCRM, which is on the radiator-overflow bracket.
 
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cbarr300

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Jun 6, 2006
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goose creek, SC
Nov 27, 2008
#23
  • Nov 27, 2008
  • #23
if you have no spark on just one cylinder it would have to be rotor, cap, wire, or plug.

What you should do is hook up a fuel pressure gauge and see what kinda PSI you're running. A simple diagnosis could reveal your issues...otherwise you're just shooting in the dark.

good luck on the issue
 

TheDamned

"I am Canadian and Damned for it!"
Jul 22, 2003
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Montréal, Québec, Canada
Nov 30, 2008
#24
  • Nov 30, 2008
  • #24
i'm running rich since I installed my mac o\r h-pipe... the o2 are still there but they're toasted... not sure what to do, i replaced them a few years ago and got the same problem. it kills my fuel economy indeed...
 

toyman

10 Year Member
Jul 19, 2007
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Vernon BC
Nov 30, 2008
#25
  • Nov 30, 2008
  • #25
TheDamned said:
i'm running rich since I installed my mac o\r h-pipe... the o2 are still there but they're toasted... not sure what to do, i replaced them a few years ago and got the same problem. it kills my fuel economy indeed...
Click to expand...


Are talking about the stock NB O2 sensors or WB O2's? Installing the OR pipe should be irrelevant. If you have installed WB's in the stock locations you are guaranteed a short life expectancy. EGT's are much too hot for them in that location.
 
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