Troubleshooting-Accelerator - BMW Forum

Neil Paz · 07-16-2006, 05:04 PM

Just wondering what the issue could be that when I press the gas pedal sometimes the engine doesn't rev-up. It takes a few moments to vroom-vroom :lol: so to speak. ANY and ALL ideas welcome: fuel filter, fuel pump, etc?

I have an `84 325e BTW, though I've noticed a lot of people with older cars have this problem. People tend to rev the engine a few times before a light changes from red to green (and no, they don't want to race) to bypass this hesitation.

Starmavin · 07-16-2006, 05:14 PM

Restricted exhaust, low fuel pressure, clogged fuel injectors, faulty fuel pressure regulator.

Does the car smoke when you do that? Does it have full power other wise?

Neil Paz · 07-17-2006, 11:58 AM

No, it doesn't smoke. I'm going to be replacing the catalytic converter in a week or two. Replaced the muffler last month.

It does have full power otherwise. This only happens when I first start the car (and have driven less than a mile) and only in first gear when I am going from standing still.

Starmavin · 07-17-2006, 04:12 PM

Auto or stick?

Neil Paz · 07-18-2006, 11:59 AM

It's a 5-speed, but don't get me wrong...this isn't a regular occurrence-type thing. Just once in a while.

Starmavin · 07-18-2006, 07:33 PM

If you are on a road alone, try this; Shift into 3rd or 4th about 1000 rpm early and floor it for a few seconds, then describe what happens. Also check the connectors just bellow the starter for corrosion, and while you are down there pull both sensors and check for build up of metal, rust or gunk on the head of the sensor.

Neil Paz · 07-21-2006, 11:43 AM

Okay, I was in first gear @ 2500 and I droped it into fourth, as expected, I "lugged" (I think is the term) the engine but it slowly increased (RPMs) as I floored it. It rattled a little when I first dropped it in 4th. Is that what you meant I should try?

I haven't had the chance to check the starter yet, but I'll look for it over the weekend.

Neil Paz · 07-26-2006, 09:54 AM

Could not definitively locate started, thogh I have a picture of what it looks like, but also didn't notice corrosion anywhere other than the downpipe. I'll have to wait for my Bentley E30 manual to get here I guess.

Starmavin · 07-26-2006, 10:11 PM

Looking for the starter? Its under the intake manifold at the rear of the motor. You can better see it from under the car. The sensors I'm talking about are mounted side by side on the lower left hand side of the transmisson bell housing. The hare held in with a hex bolt, just follow the wires to the plugs just below the starter, don't mix them up, they will plug into each other (both are the same actually) and the car won't start.