[9986paulk]

OK guys, well still no good news about this setup. Now, I wish I'd just left the car alone and saved all the money and got an 8k loan and bought something like a good used corvette for like $20k. I've been troubleshooting it for almost 3 months now and I'm getting nowhere. I have a miss at idle and I keep getting a P0174 (or P1074, i dont remember)code, which means system too lean on bank 2. I've checked injectors, intake manifold, gaskets, sealed everything everywhere, plugs, wires, coil pack, compression test, cam position sensor alignment, and just about everything you can think of. It's just not going to work no matter what I do. And I don't think it would be the MAF, which was tested anyway, because it's only one side of the engine. I might check out the drivers side 02 sometime today, but that's all I've got left. Other than that, it's time to return the car to stock and sell it all.

[9986paulk]

On another note, could I just put the stock tune back in the way it is (with 42# injectors) and let it run really rich like I had before just to see if a vac leak is the problem? Because if it were a vac leak, I'm sure running at an AFR of like 10 for a minute might let me know if that's actually the problem.

[stangcharger]

Originally Posted by 9986paulk OK guys, well still no good news about this setup. Now, I wish I'd just left the car alone and saved all the money and got an 8k loan and bought something like a good used corvette for like $20k. I've been troubleshooting it for almost 3 months now and I'm getting nowhere. I have a miss at idle and I keep getting a P0174 (or P1074, i dont remember)code, which means system too lean on bank 2. I've checked injectors, intake manifold, gaskets, sealed everything everywhere, plugs, wires, coil pack, compression test, cam position sensor alignment, and just about everything you can think of. It's just not going to work no matter what I do. And I don't think it would be the MAF, which was tested anyway, because it's only one side of the engine. I might check out the drivers side 02 sometime today, but that's all I've got left. Other than that, it's time to return the car to stock and sell it all.

that's weird.

on my 02 F150 4.2L new spark plugs gapped correctly solved that specific code for me. Other possibles i think were O2 sensors maybe. It has been awhile.

[9986paulk]

02 sensor is a possibility. We had thought it was a vac leak for a long time, which it partially was from double gasketing with the windstar. But the code generally comes up when the fuel system has been at the limit of it's adaptive ability for an extended period of time. They all point to a vac leak, but none can be found anywhere. And the fact that it is only bank 2 (drivers side), would indicate that it is a gasket or seating issue, which I can almost rule out because I can spray carb cleaner all around with no result anymore. I'm dead after the 02 is checked.

[clidefr0g]

did you upgrade your fuel pump? and gap the sparks properly?

[9986paulk]

haha yes. I have a focus pump and new plugs gapped at .32
It's a really frustrating issue.

[JTs03v6]

I would almost get a complete stock motor and drop it in there...get the vortech running right...and do one mod at a time.

[ESG-642T]

Originally Posted by 9986paulk On another note, could I just put the stock tune back in the way it is (with 42# injectors) and let it run really rich like I had before just to see if a vac leak is the problem? Because if it were a vac leak, I'm sure running at an AFR of like 10 for a minute might let me know if that's actually the problem.

Nope, you will almost instantly foul the plugs... I don't remember what all was done to your car but you shouldn't be having this many issues, especially for this long

check 02 sensor / coil pack / plug wires

[9986paulk]

OK well I'm going to pull the 02 and test it tomorrow as said on v6power.net if I really determine it's not something to do with the lower intake manifold. I'm really going to check gasket matching to see how it seals on the manifold because I can see it down the one runner because I was a little off. It doesn't seem like it would leak, but I gues this is the only way I can find out.

[ESG-642T]

Originally Posted by 9986paulk OK well I'm going to pull the 02 and test it tomorrow as said on v6power.net if I really determine it's not something to do with the lower intake manifold. I'm really going to check gasket matching to see how it seals on the manifold because I can see it down the one runner because I was a little off. It doesn't seem like it would leak, but I gues this is the only way I can find out.

Hey do you have AIM? If so IM me...

My question after looking at your pic is ... where is your MAF?

[9986paulk]

I'll IM you a little later because I just got a nerw laptop and need to download it. But my MAF is right where it should be now, about 1 foot before the last bend going to the throttle body. So almost in the middle of the loast 3' long straight piece of pipe.

[9986paulk]

Well, I finally got most of the bugs worked out of everything after ~4 months...and most of the problem was my TB. It was worn where the shaft was, which is pretty much because of the design of the throttle body extension arm, and/or not being adjusted properly for throttle cable pull by the previous owner of the TB. It is now fixed and has a GT TB, which looks better too becaue it doesn't have that IAC port to fill. I still have a few issues to work out right now after my first tuning session, which are:

drivers side 02 sensor bad, which was brand new, so this is a free fix. this means that right now he has the car running in open loop.

exhaust leak, and turbulence in my gutted cats (where the wideband is)-getting fixed monday

now my LC1 wideband doesn't work, just acting all screwy. The AFR bounces all over and just reads the error most of the time.

torque convertor-my tuner said he doesn't want to take the car past 5528 rpm because the stock converter can balloon and take out the engine @6000 rpms. but with the new converter, he says it has a ton more potential for power.

The numbers, weather corrected, on a mustang dyno: 286.2 rwhp @ 5528
268.0 rwtq @ 5528

Just remember its a mustang dyno, too.

Still might sell the car, not sure. Really depends if I can get a local buyer I guess, so I could get an 05+ GT or C5 vette.

Here are some pics I took of the graph. Weather corrected #s on another sheet...

http://www.facebook.com/photo.php?pi...1&id=608943834



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And one more thing I found today...I was about 1/4" from full throtte on those dyno pulls. That with the other problems fixed should probably get me about ~25rwhp and some torque.