vernonz_426
Registered
My 93 cranks over a lot before it will come close to starting. I changed the passenger side o2 but am having troubles getting to the driver side. Just wondering if anyone has any ideas.
thanks zack
thanks zack
starting bad
- Thread starter vernonz_426
- Start date
RE: starting bad
Zack,
Have you checked fuel pressure? Did you have a fault code or other indication that the O2 sensors were the source of the problem?
One possibility (verfiable with a fuel pressure gauge) is that the the pump (or regulator) lets fuel pressure bleed off when the pump is not running/engine turned off.
An easy test (although not foolproof) would be to 'cycle' the key to the run position and off a few times before actually cranking the engine. If the engine starts properly after three or four key cycles, the indication would be that fuel pressure is being lost when the engine (and therefore the fuel pump) is shut off.
Okay, all this may be jumping the gun a bit; do you have fault codes? Low fuel pressure?
Good luck!
Zack,
Have you checked fuel pressure? Did you have a fault code or other indication that the O2 sensors were the source of the problem?
One possibility (verfiable with a fuel pressure gauge) is that the the pump (or regulator) lets fuel pressure bleed off when the pump is not running/engine turned off.
An easy test (although not foolproof) would be to 'cycle' the key to the run position and off a few times before actually cranking the engine. If the engine starts properly after three or four key cycles, the indication would be that fuel pressure is being lost when the engine (and therefore the fuel pump) is shut off.
Okay, all this may be jumping the gun a bit; do you have fault codes? Low fuel pressure?
Good luck!
vernonz_426
Registered
RE: starting bad
no codes every now and then a light comes on and it goes away in a few sec. I just got a new fuel pump maybe 2 months ago it is the 255 lph pump from soupercoupeperformance.com
zack
no codes every now and then a light comes on and it goes away in a few sec. I just got a new fuel pump maybe 2 months ago it is the 255 lph pump from soupercoupeperformance.com
zack
vernonz_426
Registered
RE: starting bad
no memory codes, and cycling makes it start a little better but it doesnt always.
Zack
no memory codes, and cycling makes it start a little better but it doesnt always.
Zack
M8SHOSCGUY
Registered
RE: starting bad
Wouldn't be an O2 sensor. Low Fuel pressure would be a likely cause for a slow start. Since you replaced the fuel pump with a 255, maybe there's a wiring problem (loose connection)?
mark
Wouldn't be an O2 sensor. Low Fuel pressure would be a likely cause for a slow start. Since you replaced the fuel pump with a 255, maybe there's a wiring problem (loose connection)?
mark
