hesitation while accelerating

[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.

[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.

[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...

[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]

if you have stock (never replaced) ignition wires... replace that! might be an ignition problem..

Wires are brand new red 8mm wires....not the problem.

[mtechnik]

Have thw same thnig every now & then . I let p off the pedal and re-apply gas. My spark plug wires were replaced about 55.000km's ago

[325iCabrio]

fpr vacuum line?

That's not a bad idea. I might check that out.

[browntown]

fpr vacuum line?

[325iCabrio]

it's either ignition, fuel, or electrical. Lol that narrows it down for ya! lol

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.

[porsche gt1]

Yea, it takes a second longer to start than normal most of the time. When its warmed up it runs great only bogs every once in a while. Its almost like a backfire...

Car just cuts power, and then its fine again. It seems as if its kinda fuel momentarily...

Thanks for the help so far guys, keep the suggestions coming.

-Paul

If you have a bog while driving it might be your CPS as M3fan suggested as this would throw off the timing.

when my fuel pump was tarting to go it started out as a longer crank then I had to start giving it a little gas to get it to start. I hope it is something more simple like the ignition wires or distributor. They should be easier to test.

[porsche gt1]

it's either ignition, fuel, or electrical. Lol that narrows it down for ya! lol

all you need now is something wrong with the chassis and you will never figure it out

[Garageaholic]

it's either ignition, fuel, or electrical. Lol that narrows it down for ya! lol

[PУCCKAЯ_e30ka]

if you have stock (never replaced) ignition wires... replace that! might be an ignition problem..

[formula driver]

I am thinking it is your fuel pump. does you car take a while to start i.e. crank for a couple seconds before it turns on?

Yea, it takes a second longer to start than normal most of the time. When its warmed up it runs great only bogs every once in a while. Its almost like a backfire...

Car just cuts power, and then its fine again. It seems as if its kinda fuel momentarily...

Thanks for the help so far guys, keep the suggestions coming.

-Paul

[Garageaholic]

shit, i dont mean to post after myself, but i've been thinking about it alot. If you have an exhaust leak before the O2 sensor, you could have really shitty emmissions. Is your mileage decreasing too? BC if it is, you could have an exhaust leak and that causes hesitation too along with a gurgling sound under cruising.

ok i'm done now