hesitation while accelerating

[formula driver]

fpr vacuum line?

fuel pressure regulater vacuum line, how would one go about checkin to see if its ok. Check for leaks? It would leak fuel if that was the case wouldnt it?

[formula driver]

I have the same problem, and I came to the same conclusion. In fact, my E30 cutout for about two seconds and then came back to life while I was cruising at a steady 40. :crazy:

In my case I'm pretty sure it's either the crankshaft position sensor or the fuel pump. My ignition wires are original, so they're also going to (eventually) get replaced.

Good luck Formula. This problem fucking blows.

If it was the CPS it wouldnt fire at all correct? Im thinking its the fuel pump. Im not sure if it has anything to do with the AFM or not...

[325iCabrio]

Sometimes the CPS wiggles out of position and could cause intermitant problems. I figure mine's so old and probably covered in crap that it should just be replaced. When I talked about this problem on Unofficial BMW, they suggested that it could be the problem

The vacuum line from the FPR wouldn't leak fuel. It's the line from the FPR to the side of the intake manifold--it's an air line. I wouldn't imagine it'd cost more than $10 to replace it. You could spray carb cleaner on it to see if it changes the engines pitch if you really want to test it.

[porsche gt1]

if it is a vaccum leak at the fpr it is easy to check, just take some carb cleaner or some soapy water to the hose that goes from the FPR to the intake manifold. If you see bubbling replace the line. Or for $5.00 it is just as easy to replace the line.

Usually vaccum leaks are at the valve cover either at the hose connected to the valve cover or the valve cover gasket. Both are very easy to replace.

[etxxz]

does your power also cut out during hard turning? do you hear a whiny noise towards the back of the car after you're ran if for a while? ~ fuel pump.

i have both this simptoms and the long cranking times when the cars been sitting a few days. i didnt find any leaks though

[formula driver]

if it is a vaccum leak at the fpr it is easy to check, just take some carb cleaner or some soapy water to the hose that goes from the FPR to the intake manifold. If you see bubbling replace the line. Or for $5.00 it is just as easy to replace the line.

Usually vaccum leaks are at the valve cover either at the hose connected to the valve cover or the valve cover gasket. Both are very easy to replace.

Its the line that runs to the Intake manifold on the cyl head side of the mani correct? The hose is fine, it was replaced not to long ago. My CPS was replaced not to long ago either. Ill look at it though....

[formula driver]

does your power also cut out during hard turning? do you hear a whiny noise towards the back of the car after you're ran if for a while? ~ fuel pump.

i have both this simptoms and the long cranking times when the cars been sitting a few days. i didnt find any leaks though

I havent listened for the whining noise yet but I will next time I drive it. I havent really noticed the power cutting out while Im cornering yet. Is there a way to check the fuel pump?

[mtechnik]

I have it happening during apply gas during hard turns (while already rolling, not from stops). Tonight it did not hesistate in turns.

[325iCabrio]

I havent listened for the whining noise yet but I will next time I drive it. I havent really noticed the power cutting out while Im cornering yet. Is there a way to check the fuel pump?

The Bentley has a procedure to test the fuel pump. You'll need a voltmeter, but it doesn't look too hard. Getting to the fuel pump is easy too--it's under the back seat, and has a little door so you can get to it.

[AdironRider]

I had this problem and it turned out to be a small crack in one of the hoses that runs from the valve cover. Once the car heated up the hose expanded and the leak went away. Something to check out at least.

[formula driver]

The Bentley has a procedure to test the fuel pump. You'll need a voltmeter, but it doesn't look too hard. Getting to the fuel pump is easy too--it's under the back seat, and has a little door so you can get to it.

Mine's an 87 is, the fuel pumps gonna be underneath the car right? I know that doesnt sound right but thats what the bently was sayin. Remember theres only 1 pump on an 87 car.

[formula driver]

I had this problem and it turned out to be a small crack in one of the hoses that runs from the valve cover. Once the car heated up the hose expanded and the leak went away. Something to check out at least.

Ill deffinatly check that out. Thanks man...

[formula driver]

One more thing guys, when Im ideling my MPG reads 0 mpg, or to the far right.

[325iCabrio]

Mine's an 87 is, the fuel pumps gonna be underneath the car right? I know that doesnt sound right but thats what the bently was sayin. Remember theres only 1 pump on an 87 car.

Pre '88s had two fuel pumps, one transfer pump under the rear seat, and the main fuel pump under the car. 88+ only had an in-tank pump. It's common for the transfer pump to fail, and I'm pretty sure the testing procedure for the transfer pump is fairly similar to testing the later pump.

[f u z z]

Wow.. i am really fucked up and i thought you meant lyou were afraid to floor it or something, lmfao.