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7 Series - E38 (1995 - 2001)

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  #1  
Old 11-02-2012, 07:36 PM
95bmw740il 95bmw740il is offline
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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 )
Any help I would really appreciate it!
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  #2  
Old 11-03-2012, 06:59 PM
95bmw740il 95bmw740il is offline
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No one?
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  #3  
Old 11-04-2012, 06:37 AM
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beemer1804 beemer1804 is offline
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Check for vac leaks, fuel pressure, injectors

War Machine
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  #4  
Old 11-05-2012, 03:20 AM
mgoods50 mgoods50 is offline
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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.
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  #5  
Old 11-05-2012, 06:27 AM
95bmw740il 95bmw740il is offline
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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.
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  #6  
Old 11-05-2012, 06:30 AM
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beemer1804 beemer1804 is offline
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Do not buy to cheap ofa brand, let me know how it turned out.

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  #7  
Old 11-05-2012, 07:43 AM
95bmw740il 95bmw740il is offline
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Going to pickup it up in a hour or so and going to try installing it. I heard it wasnt hard to do.
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  #8  
Old 11-05-2012, 10:37 AM
mgoods50 mgoods50 is offline
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Quote:
Originally Posted by 95bmw740il View Post
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?
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It's not what you buy, it's what you build- Unknown
EN90283 - Stabled for HG repair
DH06247 - Running like a champ

Last edited by mgoods50; 11-05-2012 at 10:40 AM.
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  #9  
Old 12-25-2012, 05:27 PM
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beemer1804 beemer1804 is offline
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So what happened?

Sent from my ADR6400L using Bimmer App
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  #10  
Old 12-25-2012, 06:14 PM
95bmw740il 95bmw740il is offline
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Found out the issue, cats are clogged up.
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  #11  
Old 01-21-2013, 02:12 AM
Jsoto0494 Jsoto0494 is offline
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How did you find out that the cats were clogged?
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  #12  
Old 01-24-2013, 01:24 PM
chadley71 chadley71 is offline
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i too would like to know how you found out it was the cats clogged up. please explain??
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