Jerome Craig

Talk about buzzard's luck... I took the 86.5 out for a spin this evening as I am getting ready to put it up for auction on ebay and as I was returning home it began to run really rough. I feathered the accelerator a bit to keep the revs steady but it was obvious that something wasn't right. The motor acts like it's not getting enough gas... wouldn't rev above 3,000 rpm... but did get me back home. (Approximately 2 miles from the first sign of distress.)

In the driveway the car would run ... but very rough... wouldn't go over 2,000 rpm without very slow pressure on the accelerator. At 2,000 it would bog down and then quit if I pressed the accelerator quickly, but with very slow pressure I could get it up to 3,000 rpm. There was no smoke, no odor of unburned gas, oil pressure held steady at 5 bar, and the water temp was normal. The car was last tuned in 11/05 and compression in all cylinders was within 5% of spec. I have been running the car on very little fuel as I am trying to sell it. The last potential buyers drove the car for about 10 miles and reported absolutely no problems.

As of now - about 2 hours after I limped back home - the car will start but it's obviously in some sort of distress. Again - it does not want to rev, but there is no smoke or unfamiliar smells from the exhaust.

Unfortunately I have minimal tools, very little time and no garage! If it is a fuel filter problem I can get it to a decent technician (Corvette C5/C6 certified) about three blocks away.

Any thoughts or advice would be greatly appreciated.

Thanx

jyoon

disconnect your maf and see if it runs the same or better. sounds like that's the problem.

Jim bailey - 928 International

It is more likely that you will win the lottery than have a clogged 928 fuel filter... also more likely is your mass airflow has taken a dump...and the car is running on "limp home mode" a stored map in the LH computer for just such an occurrance . Unplug the mass air sensor and see how it runs

Bill Ball

Maybe you will luck out and it it will respond to re-seating the MAF plug. Where is that lottery ticket?

Jerome Craig

Thanks.... I'll have to fire up the WSM CD I just got from Jim Morehouse the other day.

Unless of course someone will tell me where that little jewel is ???

Yes.... I'm one of "those" kind of shark owners. I drive 'em and I clean 'em.. but I rarely work on 'em. This doesn't sound too hard though... sounds like a real low probablitiy of screwin' something up... or my other favorite trick... breakin' something really expensive!

Jerome

Bill Ball

The MAF? Remove the air filter box. The center round outlet on the air box base attaches to the MAF. Look down there with a flashlight and you will see the big black electrical plug connected to a black box on the side of the MAF - usually oriented towards the driver side. Wiggle the plug a bit and it will come off.

Jerome Craig

Thanx!

I probably won't get to it until the weekend - it's raining, and that's supposed to go on for the next several days. (Buzzard's luck....remember... it's been dry and unseasonably warm here in the DC area for the last 3 weeks!)

Well I guess I'll have to make do with the "other car".... for the next couple of days!

Jerome

CWO4Mann

Fuel Filter??

Hang in there!

Cheers,

Bill Ball

Dave:

That is one UGLY, fossilized filter! Never seen one THAT ugly before.

jpitman2

My broken up in tank filter was like that, and the inside of the tank similar, when I pulled the tank - 10 years in Arabia will do that! However, when I cut open the pressure filter, it wasnt badly loaded up with crap, and the car hadnt missed a beat in years.....I doubt that a filter will clog suddenly as described above without somebody helping it along.
jp 83 Euro S AT 50k

Th Dude

Hi Jerome,
If it ends up being your MAF... I have one that I'll trade you for those AA chips.
A new MAF will set you back about $500.
Good luck solving your problem.
D

Bill51sdr

May not be quite as simple as just wiggling it off as most Bosch connectors have that stiff wire retainer holding them in place. Watch out for that. It is a lot easier to just take the MAF out completely and remove the connector. Then you can put the MAF back into the throttle body and give it try. No need to re-install the airbox for this test as it will be apparent very quickly if the MAF is the problem or not.

Bill Ball

Hey, Bill. I haven't meant an Amp connector yet that didn't wiggle off despite that wire. Guess I have the touch.

Steve 88

Jerome, I have an extra old-but-functional MAF you can use for a test. I live near the Nova campus - can't be very far from you.

CWO4Mann

Yes that was the "before" after I dropped the tank this summer. Found all kinds of stuff in the tank .. everything except gasoline, I might add.

This is what it looked like after I cleaned it, right before reinstallation.

Cheers,