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The car is fast, but, if I hammer the pedal, it delays a good second...prior owner I am told put in new coils and plugs.
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Is it automatic? Maybe it's shifting down? Are you lugging it or is it up in RPM when you "hammer the pedal"?
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Have you driven other '98 540s to compare?Originally Posted by Eriklane
Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
Having No Trouble Here
BMW CCA Member
Essential question.
Also, are there any engine codes.
Vac leaks and high trims can cause weird accel issues but you should see if there are codes. No the fact you don't have a CEL / SES doesn't mean that you don't have codes.
2003 M3CicM6 TiAg
2002 540iT Sport Vortech S/C 6MT LSD TiAg
2008 Audi A3 2.0T DSG (the daily beater)
2014 BMW X1 xDrive28i (wifemobile)
Former:
1985 MB Euro graymarket 300SL
1995.5 Audi S6 Avant (utility/winter billetturbobattlewagen)
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I purchased the bmw 1.4 scanner, see no engine codes. Have no CEL. Have not driven others. Prob not a full second delay, but 1/2...It's just not instant. Checked the cables to the throttle body, tight. New K&N filter when I got it. Plugs look great, car overall seems very well cared for. Engine clean inside (did valve cover gaskets)...Cleaned MAF also.
Member
Again, auto or manual? Miles? Where is Rockford?
Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
Artifically Aspirated
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One of his other post said 190K miles and said Michigan.
Rockford?? He could be using a VPN (which is OK) as the IP doesn't jive with Rockford.
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Rockford,MI...
Automatic, sorry. It's not downshift delay at all, it's just a big delay.
Last edited by Eriklane; 07-25-2018 at 09:11 PM.
Member
I would check the fuel pressure
E85 fueled, Eaton m112 supercharged 4.5L M62TU, TTV racing flywheel, Spec stage 2+ clutch, 88c thermostat, eibach sway bars, wavetrac 3.15 lsd, m5 steering box, Quantum 340lph fuel pump, Dinan camber plates, some powerflex bushings, Supersprint headers, M5 cats, 2001 gas pedal upgrade and many other things done. all diy by me
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BMW CCA Member
Can you take a video?
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FWIW - I've seen a similar problem when I was Autocrossing my 528i. (Also an automatic.) When coming out of sharp turns and flooring the throttle, there was a significant delay before any RPM's would build. In my case, changing the shift pattern from D to 3 or 2 seemed to alleviate a good portion of the delay. Not perfect, but better.
James
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