Re: Drivabilty issue.
 

Ray, just to give you the BMW part number on the oil for the MN6/ZF6:
P/N = 07-51-0-009-420
Description = oil, 10W60
cost = $8.95 per liter, Westchester BMW price, plus s/s tx.;)
Fill = approx 2.2 liter, maybe a bit more...till it runs back out of the fill hole. Three liters for the first change, two next yr., etc...

I think scanning with a service bay diagnostic scanner will point to the trouble. I think if an experienced Tech sees the data the diagnosis will be evident. Plugs should not be black, brownish color is what book says. OBDII has the ability to do a cylinder balance test and I think that along with the fuel numbers will point the way to the source of the trouble.

A good guess based on the facts is either a vacuum leak the size of the Grand Canyon or there are some injectors leaking due to not closing fully.
Otherwise why would it storm @WOT and part trottle = miss.

Good luck & if extra set of hands needed, you have my #.
:thumbsup:
Tom

Re: Drivabilty issue update.
 

Thanks for the info Tom, here is an update guys. I drained all the gas out of the tank and it looked ok. I put in some ultra 94 and the same crap.
The miss was the same, I had the car in the garage and was reving the engine up to around 3500 rpm and it was missing kind of stumbling, it was also spitting out of the exhaust. The car broke up everytime I did it. You could also hear a slight miss at idle. Does anyone have any other advice for me. I seems like a injector issue 2 me.
Im going nuts here. Please advise.:cry:

Thanks
Ray

Re: Drivabilty issue.
 

I still suspect the fuel pump(it very well may be the injectors are shot but lets check the fuel psi first)...do the psi test on it and change the ff like tt said.... next will be the ohm's on all 8 injector readings....go to this site for ideas and pic's..plus jeffvette is good at zr-1 diag. so work with him on it but be sure to do steps one at a time and keep reporting here what you find as u go! Here is the PNW ZR-1 site url... We all know how you feel right now but not to worry the brotherhood will get you through these times. Right BlackJack!!!

And I quote the master!!!

LT5 Top End Tear-Down

By:

Jeff Flint - Washington State Director/ZR-1 Net Registry
Robert Melbo - Oregon State Director/ZR-1 Net Registry



Looking under the open hood of a ZR-1 can be a scary proposition. Lines run every which way and the possible expense of a misplaced screw or broken part can send shivers down the spine. What looks to be a nightmare is actually quite simple in reality. Part 1 will look at the removal of the top end, while Part 2 will focus on the cam covers for refinishing to bring new life to the engine.

http://www.pnwzr1.net/:thumbsup:

http://www.pnwzr1.net/Registry%20Project/9.JPG

http://www.pnwzr1.net/Registry%20Project/9a.JPG

Re: Drivabilty issue.
 

right on:)
blackjack

Re: Drivabilty issue.
 

Jez Ray, bless you for draining the tank! Go buy a fuel filter and use that to get the wrench size for the nuts on it and the lines...I don't remember if they are the same, sorry. Swap the filter, and do a pressure test alla the book flow chart or see Jeff's answer to Nate(sick 90) for a simpler way.

Gotta start eliminating places to look. If the fuel sys check out then ing sys is next on line. I would still say that if the fuel sys checks out okay I would borrow a scan tool and "look" at what the motor is doing. You can take out all the plugs and turn the key to "on" and smell all the plug holes...if the injectors are leaking you might smell the fuel or just turn the key on for a short time and then pull the plugs to see if gas is present. Obviously it shouldn't be and the injectors are leaking.

:thumbsup:
Tom

Re: Drivabilty issue.
 

Before you go crazy:

Did any of the stock plugs have the platinum tip missing from the ground? This will effectively increase the gap. What did you gap the new plugs at?

Ted

Re: Drivabilty issue.
 

Plugs were ok, they were black, changed them with 419's and gap is 45.
ray

Re: Drivabilty issue.
 

Ray,
Wish I were closer. I had a car once that sputtered on throttle tip in. It was the plugs. If it were my car, I would re-gap the plugs to .035 and see if it makes a difference. It is free to do so if you take your time and properly remove the plug boot. Is the 419 the dual platinum? If so, get rid of them!!! The platinum puck will fall off. Ted

Re: Drivabilty issue.
 

ok what plugs would you suggest.
thanks
RAY

Re: Drivabilty issue.
 

I've been lucky to find Rapidfire #9s. My yellow car has the expensive Iridium plug and it's good for what it is. #9s are about $2 each and go strong for about 10,000 miles. Ted