My last effort

[Karl]

Originally Posted by Kevin

Not sure it works that way. I put mine away early last year and when I think about getting it out I go between, Yes, can't wait to drive it! and ****, it's still broken.

It can work how ever you want it to work. Just takes some ambition to get there.

If you want to get your car fixed you can get it fixed. It may take some time but ultimately it can be done. If not, jump ship and sell it.

[Kevin]

Originally Posted by pushrod-v8

It can work how ever you want it to work. Just takes some ambition to get there.

If you want to get your car fixed you can get it fixed. It may take some time but ultimately it can be done. If not, jump ship and sell it.

not everyone is willing to put in the....lets call it dedication.....it takes to own one of these

[chriskinzel]

Mark,
Your pain is felt by me and others. I also live a long way from help (SLC, UT) and know how frustrating this can feel. I have had many issues that the brotherhood have helped me with, but if the problem is ever inside the motor I am done as well. We will all miss hearing of your success in fixing the problem, as I know that you could it you had the time. I personally know that sometimes you have to cut your losses and get out. I wish you all the best in finding your next 'toy'.

Good luck
Chris

[G8nightman]

Where in NJ are you? Do you want to sell the car?

[LGAFF]

Dominic you have a copy of my chip from the 91 368 that I have.....this is the same chip he is running. I thought he called you

[Mitsumark]

Yes..I did try to run the oil right at the add mark..It didn't help..To answer a couple of the above questions..Yes the current chip is a Haibeck canned tune for my mods and IAT relocation..I spoke to Marc asking if he thought maybe something needed tweaking and he said his tune has no effect at idle and even below 50% throttle....I took that as the stock parameters are left alone until the throttle is more than 50%..Now remember that the majority of smoke it at idle..It does throw out some smoke under heavy throttle but it isn't nothing I haven't seen when dropping the hammer on most high power cars..My concern is not the smoke under load..It shouldn't be smoking at idle..This is exactly what goes on in sequence..Car starts up cold,no smoke at all..Once warm it will start to smoke at idle..Upon acceleration it has plenty of power,no hesitation..Coasting down to stop,once in neutral the motor will start to hunt from 400-1200 RPM and sometimes even feels like its gonna stall but doesn't..During this hunting it feels like the car is choking on fuel and smoke smells strong like fuel/oil mix..Once fully stopped the idle smooths out..When I told Marc the plugs keep fouling and I think it's running way rich,he responded with the following..

> > What is the idle speed when the engine hot? It should be 750 rpm. The calibration is designed for a stock manifold vacuum of 40 kpa. You should measure the manifold vacuum. If it is over 50 kpa, the MAP sensor will add so much fuel that the oxygen sensors can't control it and the engine will run rich for fuel at idle and under 2000 rpm.
>> >
>> > If you use a data scanner to read the manifold vacuum, also record the Block and Integrator fuel trims for each bank and let me know.

Now I don't have the diagnostic tools to do this,nor do I even know what some of it means..I'm guessing it has to due with Idle counts,AFR,ect..

Lee-I didn't call Dominic as I didn't want to spend money on another chip as I'm not sure if that's even the problem..I borrowed a stock chip from Dave Johnson(Thanks Dave) and the hunting still pursued, smoke was much less but still present..Granted this was for a bone stock 91 350 car..Car also had no gonads with the stocker..

As far as selling it,,I really don't want to but I think if someone came to me with cash money right now,I'd probably let her go..The only way this car will ever run correctly is if it finds it's way to Chicago because there is no one around here and I honestly don't want to touch it anymore...Hey Frank--When exactly are you going out there?Im brainstorming..

[Mitsumark]

Guys I just thought of something..Is it possible that the very first chip the car was built with(B Kirchoffer)was tuned to always run open loop?Is that possible?Hmm..No smoke when cold,no surging,better idle...Seems and soon as the car goes closed loop the smoke and surging starts...I also remember the RPM was set to 1000RPM with the original Kirchoffer chip for better idle due to Jeal cams and to cut down on flywheel noise..I wonder if Vette Docs tampered with the TB screw to match the chip calibration...I'm now running a Haibeck chip with 750RPM idle but haven't touched the idle screw..Sounds confusing but does anyone understand where I'm going with this?

[Blue Flame Restorations]

Yes. Your theory "may" have validity??


I only see two variables that you changed prior to the issue besides your plenum pull. I would change them back one at a time and evaluate with each change.

If those two variables do not prove to be at fault, I'd pull the plenum again and do a thorough inspection, including the gaskets for damage.

[Pete]

Originally Posted by Mitsumark

Guys I just thought of something..Is it possible that the very first chip the car was built with(B Kirchoffer)was tuned to always run open loop?Is that possible?Hmm..No smoke when cold,no surging,better idle...Seems and soon as the car goes closed loop the smoke and surging starts...I also remember the RPM was set to 1000RPM with the original Kirchoffer chip for better idle due to Jeal cams and to cut down on flywheel noise..I wonder if Vette Docs tampered with the TB screw to match the chip calibration...I'm now running a Haibeck chip with 750RPM idle but haven't touched the idle screw..Sounds confusing but does anyone understand where I'm going with this?

If the issue is/was fuel closed loop would have less smoke since the ECM would have some control,if oil issue is something else like guides/seal,rings etc, then closed or open would not make a difference.

On the Idle you are right if the TB screw is adjusted for 1000 rpm and the chip is programed for 750 this will cause what you are experiencing.
Idle should not effect oil issue.

Pete

[XfireZ51]

Originally Posted by Mitsumark

Guys I just thought of something..Is it possible that the very first chip the car was built with(B Kirchoffer)was tuned to always run open loop?Is that possible?Hmm..No smoke when cold,no surging,better idle...Seems and soon as the car goes closed loop the smoke and surging starts...I also remember the RPM was set to 1000RPM with the original Kirchoffer chip for better idle due to Jeal cams and to cut down on flywheel noise..I wonder if Vette Docs tampered with the TB screw to match the chip calibration...I'm now running a Haibeck chip with 750RPM idle but haven't touched the idle screw..Sounds confusing but does anyone understand where I'm going with this?

The reason tuners use Open Loop w larger cams is because they don't deal w the cam overlap and how that affects the O2 sensor readings. The ECM thinks the motor is running lean due to the fresh air going past the O2 sensor. It's an issue at idle but generally not anywhere else. If the ECM IS "trying" to get to a 750rpm idle(depending on the cams probably not going to run very well) it will attempt to do that but likely invoke the stall saver as the engine begins to falter.
If the stall saver values haven't been changed, they can produce wild swings on a cammed motor since they were meant for stock cams.
Do you KNOW if VD did adjust the Min Air settings? otherwise the cal could just have had idle set for 1000rpm.