Accelaration problems

[b.u.ti-ful]

Read this from another thread and keep in mind that earlier on the page the person posting referred to the 1286 code, not 1284:


I finally got some information about the 1284 code!!! From what I've discovered that code is thrown when your alternator is becoming faulty or has been faulty. I replaced my alternator last fall and did the reset trick and I've drove about 50 miles so far and no codes!!! WOOT! If anyone wants/needs to know the reset trick let me know. Even though I'm not sure what all cars it works on, but I do know for sure it works on a 94 318is!! Hope this helps some people with that 1284 code.
bmw318is1994 is offline Report Post Reply With Quote

[Bobbak]

can you tell me how to do that reset thing

i was gonna unplug my battery and yank my ECU and plug it back in i thouhg it might have a bad connection or something

[b.u.ti-ful]

You have to contact member bmw318is1994

[b.u.ti-ful]

I think one of your plugs is not firing.

Look at the plugs and see if one of them is sootier than the others.

If a plug comes out too easily that could cause the problem.

Make sure the cables are on tight at the plugs AND under the cover of the coil assembly.

Also be sure the cables are in the right order!

[b.u.ti-ful]

Further spark testing:

[Bobbak]

ok thanks alot buTIful im gonna go test the plugs and the wires

and 2 quick questions if my plugs, wires, and coils are bad will they cause a CEL
and will and of this effect the idle when the ac is on?


thanks again i really appreciate all the help from everyone who posted suggestions

you guys are awsome

[Bobbak]

well i cleaned up my plugs and and made sure the wires were in the right spots and IT WORKED the plugs were dirty so everything is FIXED but there is another problem whenever i turn on the ac the fuse for the compressor blows the box says use a 7.5 amp fuse i changed it to a 10 amp and it blew when i pushed the ac button keep in mind guys that i dont have a ti m42 motor its off of a coupe or a sedan but its still a m42 should i just put a bigger fuse?

[b.u.ti-ful]

Good to hear your car runs better now.

The AC, you might read this page:

http://en.allexperts.com/q/BMW-Repai...C-troubles.htm

[VROOMCP]

Originally Posted by Bobbak

where is the MAF located on the m42 i have no clue thanks

The M42 has a AFM. It is located right after the air filter. In this pic, its the black rectangular piece with a screw connector. Nevermind the arrows, I took this pic from BF.c

[Bobbak]

well its begun again the same damn problem as before is starting im gonna check the plugs and read the codes tomorrow and hopefully it will be easier to fix

one quick question does the ECU adjust the amount of gas going in the car or is there anyways i can adjust the gas flow and make my car run leaner or richer ?

thanks bobby

[b.u.ti-ful]

Do you have the correct spark plugs?

Were you able to test or replace the plug wires?

Have you had a compression test?

[Bobbak]

i got top of the line plugs Bosch 4+ platinum

no compression test

and i still have the same wires and coils

[bmdirtyu]

I'm having a similar problem so I ran across this thread... I've not read much good about the Bosch Platinums in these cars so far... Are you still having problems?

[marko]

if it was the crank sensor - the car would not start, I dont think...

Originally Posted by 318racer

i think its your crankshaft position sensor.on RealOEM it is listed as "pulse generator - crankshaft". Any shop you go to would refer to it as a crank position sensor. Here it is on RealOEM:

http://www.realoem.com/bmw/showparts...58&hg=11&fg=10

It's #14 on that illustration. Part #12141247622

my friends car had what seems to be the same problem and it got fixed.

just a suggestion im no mechanic though... hope it helps

[marko]

I dont think the problem is with teh mixture... did you try swaping the MAF/AFM with a fellow M42 owner to see if the problem will go away?

Originally Posted by Bobbak

well its begun again the same damn problem as before is starting im gonna check the plugs and read the codes tomorrow and hopefully it will be easier to fix

one quick question does the ECU adjust the amount of gas going in the car or is there anyways i can adjust the gas flow and make my car run leaner or richer ?

thanks bobby