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-   -   1995 740il Bad acceleration (http://www.bimmerfest.com/forums/showthread.php?t=655728)

95bmw740il 11-02-2012 07:36 PM

1995 740il Bad acceleration
 
Hi, I recently acquired a 1995 740il 4.0L auto from a friend. The car starts, idles, runs and shifts fine. Can cruise in my neighborhood around 25mph fine but when I go to accelerate, WOT the car doesn't really move, kinda reminds me of the titantic. Big and slow. When I received the car it had a fuel pump issue so It would not stay running but I replaced that. I'm wondering if the fuel filter is clogged? Fuel injectors are clogged? Doubt it but cats could be clogged? I know about cars a decent bit but Bimmers drive me nuts. (im a VW guy :rofl: )
Any help I would really appreciate it!

95bmw740il 11-03-2012 06:59 PM

No one? :cry:

beemer1804 11-04-2012 06:37 AM

Check for vac leaks, fuel pressure, injectors

War Machine

mgoods50 11-05-2012 03:20 AM

you're not getting responses because your question is insulting to those who choose to drive E38s. No offense intended- I'm being straightforward.

Answering your question objectively is nearly impossible. Acceleration is subjective. You may be asking too much of a very heavy car, despite its near 300 ft/lbs of torque. That said, a hot rod trans am driver (Wr6 or whatever) was once shamed when he thought he would run off and leave me.

Your symptom is too vague.

95bmw740il 11-05-2012 06:27 AM

I did get a response thank you though for being forum police. No one said i was expecting spinning tires at wot in this car. I have a 400hp vw that does that fine. My question/help was 100% readable and answerable. Thats why war machine answered it way before you. No offense-intended ;). Btw war machine, i just bought a new fuel filter today and hopefully that will fix my issue.

beemer1804 11-05-2012 06:30 AM

Do not buy to cheap ofa brand, let me know how it turned out.

War Machine

95bmw740il 11-05-2012 07:43 AM

Going to pickup it up in a hour or so and going to try installing it. I heard it wasnt hard to do.

mgoods50 11-05-2012 10:37 AM

Quote:

Originally Posted by 95bmw740il (Post 7176407)
I did get a response thank you though for being forum police. No one said i was expecting spinning tires at wot in this car. I have a 400hp vw that does that fine. My question/help was 100% readable and answerable. Thats why war machine answered it way before you. No offense-intended ;). Btw war machine, i just bought a new fuel filter today and hopefully that will fix my issue.

That was not my intent at all. I only meant that you should examine more the overall picture. I could laundry list typical issues that would prevent maximum oomph-- but that is much like just blindly throwing money at the problem. I'm not implying anyone else is suggesting that practice- only that for me personally to provide any real direction, more info is needed. Hope that makes better sense. I am in no race to answer questions, and after reviewing the thread- you didn't even follow his advice. Not sure why you assumed I was looking down my nose at you; I was not.

With that in mind, your problem is no doubt the result of reduced low pressure, retarded timing, lack of ignition /and / or weak spark, reduced combustion and / or compression, air / fuel mixture inefficiency, incorrect air density metering, intake air restriction, exhaust gas restriction... see my point?

I hope your fuel filter does fix the issue, but if it's clogged enough to really hamper WOT flogging the 17 year old car like a backdoor rug-- likely there are other issues that are contributing and / or helping mask other problems related to reduced performance. What is the MPG like city / hwy?

beemer1804 12-25-2012 05:27 PM

So what happened?

Sent from my ADR6400L using Bimmer App

95bmw740il 12-25-2012 06:14 PM

Found out the issue, cats are clogged up.

Jsoto0494 01-21-2013 02:12 AM

How did you find out that the cats were clogged?

chadley71 01-24-2013 01:24 PM

i too would like to know how you found out it was the cats clogged up. please explain??


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