I have a 1991 535iM that I have recently been restoring. I had the head professionally rebuilt, replaced all the gaskets, all cooling parts, all ignition minus wires. Well the car has been running problem free for 6 months. It pulls very good down low but I have always noticed that it doesn't seem to pull very well past 4500rpms. Meaning it pulls up to 4500rpm and then starts pulling slowly like it doesn't want to keep going(especially in 2nd gear)? It is like the motor is running out of air or something. I am still on the stock chip and AFM. Wondering if you guys have any insight to what may be going on?
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M30 Not pulling up top!!
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Yeah, I know. I was using the M to let you know my car is a 5 speed. The only M that was ever on a E34 was the M5 and the 1995 540i M-Tech. M540i was only sold in Canada, and they only got like 32 of them. But I am aware of everything. I have owned a few E34's now and have always been on bimmerforums, so don't think I am the typical noob that has no clue about anything.;)
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Could be your fuel pump going on.... mine does this if I am at 1/4 gas of tank.Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205
OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827
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