Wideband/Running lean issue
Well that makes me feel better. I have a few plugs that look more lean than others, but aren't too bad.
I sent the injectors off to a place locally. Will have them back by Friday. I completely forgot that FIC cleans and flows them for free. Oh well!
I sent the injectors off to a place locally. Will have them back by Friday. I completely forgot that FIC cleans and flows them for free. Oh well!
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Joined: Nov 2003
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From: Norn Iron
methanol injection usually either works or it doesnt though.
It doesnt destroy your injectors, or mean they need cleaned twice a year ( although that does seem excessive )
There is bound to be filters or injectors etc out there that are as reliable as a normal fuel setup ?
I just had my FIC 127s cleaned and 2 were flowing slightly less than the others. We cleaned them a couple more times and they ended being perfect after. I bought mine used and i know the guy before ran E85 through them. The cleaning should really help out.
I think a lot of it is how well E85 cleans out your gas tank and lines. I mean mine is absolutely spotless and i know for a fact it wasn't that clean before i made the switch. Filters catch a lot of it but it wont catch it all.
I think a lot of it is how well E85 cleans out your gas tank and lines. I mean mine is absolutely spotless and i know for a fact it wasn't that clean before i made the switch. Filters catch a lot of it but it wont catch it all.
Thanks for the info Ryan. I am hoping that is all it is. I did have the E85 in my tank for over 6 months and ran that when it was first going last month. Hopefully will find something out this evening or tomorrow at the latest.
Good news....errr bad news I suppose. The injectors are all within 4% of eachother. They did a light scribe on them, whatever that does, but it looks like I am left chasing my tail. Luckily, I haven't spent much money chasing this issue. All parts I have borrowerd have been brand new (pumps) or slightly used (wideband).
If a fuel filter is clogged, could it still appear to be in good shape and show a rise in fuel pressure to where it should be? I have seen some filters in E85 look black, mine looks new. How about the FPR itself? It is after the rails if that matters. Could my return have a plug in it and be keeping pressure in the rails? I have the stock feed as my return now with a newer stock replacement filter still in it.
Could the motor be hurt? It sounds good, and pulls to redline for whatever that is worth.
I thought maybe an exhaust leak in the downpipe, but I imagine that it would have to be pretty significant for that and I haven't seen anything in the form of holes or cracks before the sensor.
Leak at the turbo and exhaust gasket? Haven't noticed anything different in spool as I could tell and haven't noticed any odd exhaust leak sounds. Although I do have my downpipe out the bumper.
I am grasping at straws at this point. I am almost to the point of putting the tune-up from the dyno back in it and putting tape over my wideband!
If a fuel filter is clogged, could it still appear to be in good shape and show a rise in fuel pressure to where it should be? I have seen some filters in E85 look black, mine looks new. How about the FPR itself? It is after the rails if that matters. Could my return have a plug in it and be keeping pressure in the rails? I have the stock feed as my return now with a newer stock replacement filter still in it.
Could the motor be hurt? It sounds good, and pulls to redline for whatever that is worth.
I thought maybe an exhaust leak in the downpipe, but I imagine that it would have to be pretty significant for that and I haven't seen anything in the form of holes or cracks before the sensor.
Leak at the turbo and exhaust gasket? Haven't noticed anything different in spool as I could tell and haven't noticed any odd exhaust leak sounds. Although I do have my downpipe out the bumper.
I am grasping at straws at this point. I am almost to the point of putting the tune-up from the dyno back in it and putting tape over my wideband!
9 Second Club
Joined: Nov 2003
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From: Norn Iron
Depends where you're measuring fuel pressure.
If it is after all the injectors/filters and before the return...ie in the FPR and there are no dead ends in the system. Then if pressure is good, all is well in that respect.
If you measure elsewhere, or at a dead end somewhere then yes you could get a false reading.
Is the porcelain only cracked externally, and no other visual issues with the plug ?
It could simply be physical damage from installing the plug ( or less likely removing ) that has been the problem all along.
If it is after all the injectors/filters and before the return...ie in the FPR and there are no dead ends in the system. Then if pressure is good, all is well in that respect.
If you measure elsewhere, or at a dead end somewhere then yes you could get a false reading.
Is the porcelain only cracked externally, and no other visual issues with the plug ?
It could simply be physical damage from installing the plug ( or less likely removing ) that has been the problem all along.
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Verdad Gallardo It just started doing it out of the blue. Had it tuned on the dyno and all seemed well. I changed the trans fluid and oil after the dyno session then it started reading lean for whatever reason. I suppose I will do all the other normal things like compression test and whatnot.
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Joined: Nov 2003
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From: Norn Iron
Yea, but the plug might still have been broken back then, but just took a while to actually stop functioning.
You've already proven injectors and fuel system are fine. So presuming the injector is getting a signal ok...then the broken plug does seem most likely the cause of the running problem.
You've already proven injectors and fuel system are fine. So presuming the injector is getting a signal ok...then the broken plug does seem most likely the cause of the running problem.
So I got the injectors back, changed plugs, and took it for a drive. Still doing the same thing. I started messing with the tune and it seemed to be getting closer. The more pulls I did, the leaner it seemed to get. So...instead of watching the wideband, I looked the fuel pressure gauge. It's dropping pressure as boost rises. I could have swore it was showing fine the last time I looked at it. Anyway, on wastegate spring pressure only, 9 lbs., it seems to show fine at times, and others it does not. The AFR's are in check on 9 lbs., but the pressure will stay constant, or drop slightly.
I have different pumps in it, injectors are good, filter is good too. Has anyone ever had a FPR go bad, or not work? I checked the vac line and it appears to be good but I will pull it completely off tomorrow and make sure there are no cracks or anything in it. Anything else I should check? It acts like it has a vacuum leak somewhere as it has trouble idling now for whatever reason.
Hopefully I can track something down tomorrow morning.
I have different pumps in it, injectors are good, filter is good too. Has anyone ever had a FPR go bad, or not work? I checked the vac line and it appears to be good but I will pull it completely off tomorrow and make sure there are no cracks or anything in it. Anything else I should check? It acts like it has a vacuum leak somewhere as it has trouble idling now for whatever reason.
Hopefully I can track something down tomorrow morning.
9 Second Club
Joined: Nov 2003
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From: Norn Iron
How much is it dropping ?
A small amount wouldnt be a big deal, a lot would.
Although more important than that....was it dropping before, or was it constant before ?
Anything can go faulty.
Check vac lines and FPR with a mityvac or similar to ensure nothing is leaking
Spray some carb cleaner/easy start around the intake to see if rpm changes. This would indicate a vacuum leak as it draws in the spray
A small amount wouldnt be a big deal, a lot would.
Although more important than that....was it dropping before, or was it constant before ?
Anything can go faulty.
Check vac lines and FPR with a mityvac or similar to ensure nothing is leaking
Spray some carb cleaner/easy start around the intake to see if rpm changes. This would indicate a vacuum leak as it draws in the spray
It's dropping below the base fuel pressure and not rising on a 1:1. A buddy and I took the fuel bucket apart again and found a couple of leaks there. Fixed those, and still doing the same thing. I just don't understand how it was fine on the dyno and then all of the sudden it is doing this. I am going to try a different FPR and see if that does anything. My buddies car is down so he is going to let me try his out. One more thing to rule out.
This may sound crazy, but with large pumps and a small return on e85, I have seen fuel pressure at idle be normal and then drop as you start using fuel and it has to return less only to start rising again as you near redline. Drove me absolutely nuts trying to tune the car until we figured it out. Was using a single 340 with another on a hobbs switch. We were using a -6 return.