Last year the engine died in my 1986 325e.
I did not figure out what was wrong because I wanted an 325i engine from my totaled '87 325is (pre 9/87).
Over New Years I saw an add for a used Bimmerheads M20B29 with 6K miles on it.
Last week we had the first start that didn't idle well (could barely keep it running) until we unplugged the 325e MAF. I replaced that with the 325is MAF.
So I finally got it installed this Monday. The first test drive was a tentative drive around the block. It felt peppy, but low RPM acceleration around the corner produced a slight ping.
I was excited and planned in getting premium gas on the way home from the mechanic.
On the way to the gas station (8 miles of freeway), it ran okay, but I felt slight miss fires. I speculated that it was the when I let off the throttle. (TPS sensor?)
After filling up with gas, it ran horribly. To the point where the tires would chirp as the engine cut out.
I looked over things in the parking lot, but didn't see anything obviously wrong.
The cat was smoking hot and burning oil residue off the outside.
I let it sit for about 5 minutes and drove it back the mechanic (8 miles). It seemed okay if I kept it below 1500 RPM, but after a while it started cutting out again. I pulled over and let it sit for 5 minutes and then was able to drive okay. I got up to 80 MPH on the freeway and thought it may have "fixed" itself, but as I was exiting the freeway, it started cutting out.
Wednesday we did a smoke test and found a leak in intake boot.
That was replaced today, but it still runs crappy.
I have rebuilt ebay Mustang injectors.
The adjustable timing in set to stock.
Fuel pressure is at 3 bar.
We have spark at the plugs.
The injectors are pulsing. (Check with a device that "listens" to them and flashes a light.)
The wiring harness and MAF are from the 325is.
New O2 sensor.
Intake vacuum is a little low.
Manifiold pressure is normal. (I though it might have a plugged cat.)
What could cause an intermittent running well condition?
Is there some comprehensive troubleshooting steps for this?
Could it be caused by a faulty crank sensor?
Problem with the ECU?
My mechanic thinks it might be the MAF, but unplugging it does not change.
I did not figure out what was wrong because I wanted an 325i engine from my totaled '87 325is (pre 9/87).
Over New Years I saw an add for a used Bimmerheads M20B29 with 6K miles on it.
Last week we had the first start that didn't idle well (could barely keep it running) until we unplugged the 325e MAF. I replaced that with the 325is MAF.
So I finally got it installed this Monday. The first test drive was a tentative drive around the block. It felt peppy, but low RPM acceleration around the corner produced a slight ping.
I was excited and planned in getting premium gas on the way home from the mechanic.
On the way to the gas station (8 miles of freeway), it ran okay, but I felt slight miss fires. I speculated that it was the when I let off the throttle. (TPS sensor?)
After filling up with gas, it ran horribly. To the point where the tires would chirp as the engine cut out.
I looked over things in the parking lot, but didn't see anything obviously wrong.
The cat was smoking hot and burning oil residue off the outside.
I let it sit for about 5 minutes and drove it back the mechanic (8 miles). It seemed okay if I kept it below 1500 RPM, but after a while it started cutting out again. I pulled over and let it sit for 5 minutes and then was able to drive okay. I got up to 80 MPH on the freeway and thought it may have "fixed" itself, but as I was exiting the freeway, it started cutting out.
Wednesday we did a smoke test and found a leak in intake boot.
That was replaced today, but it still runs crappy.
I have rebuilt ebay Mustang injectors.
The adjustable timing in set to stock.
Fuel pressure is at 3 bar.
We have spark at the plugs.
The injectors are pulsing. (Check with a device that "listens" to them and flashes a light.)
The wiring harness and MAF are from the 325is.
New O2 sensor.
Intake vacuum is a little low.
Manifiold pressure is normal. (I though it might have a plugged cat.)
What could cause an intermittent running well condition?
Is there some comprehensive troubleshooting steps for this?
Could it be caused by a faulty crank sensor?
Problem with the ECU?
My mechanic thinks it might be the MAF, but unplugging it does not change.
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