Eating gas like it's candy...
10-20-2005, 10:47 PM
#11
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Join Date: Feb 2002
Posts: 148
Well, here's an update of sorts...
I pulled both fuel rails off last night so I could put voltage to each injector to see if they were stuck. All 6 clicked when I put the battery to them so at least they aren't stuck. I cleaned them up to get rid of some of the crap that was built up on them and put them back in this evening.
I borrowed a fuel pressure tester from a friend of mine. At idle the fuel pressure is a steady 37 psi. No variation that I noted. This kind of puts me back at square one. I rechecked to verify that there is no form of fuel correction turned on.
What does this leave me with? It still idles fine. The timing light shows that all plugs are firing fine. It still smokes and reeks of fuel way more than normal. Oil and water levels are fine. The fuel pump and fuel filter are both fine. I'm pulling about 480 mmHg at idle. Pulling any more fuel out at idle still causes it to 'hunt'.
Sigh...I was hoping that I'd have an answer by now...
Reese
I pulled both fuel rails off last night so I could put voltage to each injector to see if they were stuck. All 6 clicked when I put the battery to them so at least they aren't stuck. I cleaned them up to get rid of some of the crap that was built up on them and put them back in this evening.
I borrowed a fuel pressure tester from a friend of mine. At idle the fuel pressure is a steady 37 psi. No variation that I noted. This kind of puts me back at square one. I rechecked to verify that there is no form of fuel correction turned on.
What does this leave me with? It still idles fine. The timing light shows that all plugs are firing fine. It still smokes and reeks of fuel way more than normal. Oil and water levels are fine. The fuel pump and fuel filter are both fine. I'm pulling about 480 mmHg at idle. Pulling any more fuel out at idle still causes it to 'hunt'.
Sigh...I was hoping that I'd have an answer by now...
Reese
10-21-2005, 04:27 PM
#12
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Join Date: May 2002
Location: California
Posts: 22,465
hmm wierd, 37psi is right at spec, i guess it could be a dirty injector still but it might be time to put a wideband on it and see whats going on. i wanna say it could be a failing coil, but theres 6 of em, so it seems unlikely
10-21-2005, 06:11 PM
#13
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Join Date: Feb 2002
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I have a friend coming over in a bit so maybe I can check to see if the secondaries are leaking. I was able to check the primaries by myself since they are clamped in place. I just turned on the fuel pressure and watched to see if they were leaking. I couldn't do the secondary rail that way since the pressure would have shot them across the yard. LOL.
I'm going to get a friend to weld the WB sensor into my downpipe this weekend so I can do that as well, Mike. I don't think it's a coil mainly because I'm getting a reading with the timing gun on each one.
How much do you remember about your Fuel Setup page, Mike? I know that it currently shows both Sequential and Staged checked. The box underneath the Divide By box (sorry I can't remember the name offhand) shows 100%.
More to come...
Reese
I'm going to get a friend to weld the WB sensor into my downpipe this weekend so I can do that as well, Mike. I don't think it's a coil mainly because I'm getting a reading with the timing gun on each one.
How much do you remember about your Fuel Setup page, Mike? I know that it currently shows both Sequential and Staged checked. The box underneath the Divide By box (sorry I can't remember the name offhand) shows 100%.
More to come...
Reese
10-21-2005, 08:51 PM
#14
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Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by nota944' post='771532' date='Oct 21 2005, 04:11 PM
I have a friend coming over in a bit so maybe I can check to see if the secondaries are leaking. I was able to check the primaries by myself since they are clamped in place. I just turned on the fuel pressure and watched to see if they were leaking. I couldn't do the secondary rail that way since the pressure would have shot them across the yard. LOL.
I'm going to get a friend to weld the WB sensor into my downpipe this weekend so I can do that as well, Mike. I don't think it's a coil mainly because I'm getting a reading with the timing gun on each one.
How much do you remember about your Fuel Setup page, Mike? I know that it currently shows both Sequential and Staged checked. The box underneath the Divide By box (sorry I can't remember the name offhand) shows 100%.
More to come...
Reese
yeah i dont think its a coil either, theres 6 of em. it should be sequential and staged, i'm not sure about the divide by box, i'd have to look at one of the maps. did you do any firmware/software updating? or save any maps? sometimes things change when you save maps too.
yeah the secondaries are a pain, ive shot a few around myself!
did this start all at once? or was it gradual?
are all the temps and stuff normal? maybe one of the temp sensors took a dump?
10-24-2005, 11:22 AM
#16
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Join Date: Feb 2002
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Ok, I MIGHT have come up with a cause for my problem. Bear with me and then critique.
I pulled the entire exhaust off the car yesterday from the turbo back. When I started the car there was NO smoke at all even with the cold start maps turned on.
Is it possible that when I was trying to pull start my car I shoved so much fuel through the system that it got into the packing in my presilencer and/or muffler and now it is trying to burn itself off? Also, the inside of the entire exhaust system is heavily coated in carbon/soot. We tried to clean some of it out with a synthetic scrub pad and carb cleaner but I think we just pissed it off. LOL.
Does this sound feasible? If so, I feel a bit foolish. Heh.
Reese
I pulled the entire exhaust off the car yesterday from the turbo back. When I started the car there was NO smoke at all even with the cold start maps turned on.
Is it possible that when I was trying to pull start my car I shoved so much fuel through the system that it got into the packing in my presilencer and/or muffler and now it is trying to burn itself off? Also, the inside of the entire exhaust system is heavily coated in carbon/soot. We tried to clean some of it out with a synthetic scrub pad and carb cleaner but I think we just pissed it off. LOL.
Does this sound feasible? If so, I feel a bit foolish. Heh.
Reese
10-24-2005, 01:12 PM
#17
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Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by nota944' post='772177' date='Oct 24 2005, 09:22 AM
Ok, I MIGHT have come up with a cause for my problem. Bear with me and then critique.
I pulled the entire exhaust off the car yesterday from the turbo back. When I started the car there was NO smoke at all even with the cold start maps turned on.
Is it possible that when I was trying to pull start my car I shoved so much fuel through the system that it got into the packing in my presilencer and/or muffler and now it is trying to burn itself off? Also, the inside of the entire exhaust system is heavily coated in carbon/soot. We tried to clean some of it out with a synthetic scrub pad and carb cleaner but I think we just pissed it off. LOL.
Does this sound feasible? If so, I feel a bit foolish. Heh.
Reese
its possible. what kinda mpg are you getting? fill the tank, and go drive a couple miles on the freeway.
10-27-2005, 06:23 PM
#18
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Join Date: Dec 2002
Location: Wayne, NJ
Posts: 4,837
cancel what i was gonna say.
yea see if your car is actually using all that fuel that looks to be burning, if not then you might have just covered the exhaust in gas and ****. sorta weird, definitely not something id imagine happening.
and 4 hours idling at 1000 rpm id probably have to refill my 91 suburbans fuel tank
, all 30 gallons.
kevin.
yea see if your car is actually using all that fuel that looks to be burning, if not then you might have just covered the exhaust in gas and ****. sorta weird, definitely not something id imagine happening.
and 4 hours idling at 1000 rpm id probably have to refill my 91 suburbans fuel tank
kevin.
10-28-2005, 07:25 AM
#19
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Join Date: Feb 2002
Posts: 148
LOL, good point, kevin! I guess it just seemed rather excessive, but I was comparing it to my Ranger. I've had it sit idling while doing yard work before. Two different animals, though.
I'm definitely going to be able to go drive it around for a while tonight, so I'll let you guys know what happens.
Reese
I'm definitely going to be able to go drive it around for a while tonight, so I'll let you guys know what happens.
Reese
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