Hesitation Problems

[race01]

1987 325e. Hesitates when accellerating. Changed plugs, wires, coil, flywheel transmittors. Is this an electrical problem, or an injector issue? Otherwise car runs fine.

[Justin318is]

hey i have the exact same prblem but i have a 318is and ever since i bought it it have been slowly going down hill it hesatates off the line

[race01]

Originally posted by Justin318is@Jul 31 2005, 11:15 AM
hey i have the exact same prblem but i have a 318is and ever since i bought it it have been slowly going down hill it hesatates off the line

[snapback]366374[/snapback]

Thanks

[325eXTATIC]

have you checked your Oxygen Sensor?

If it has gone bad, it may send mixed signals, or no signal at all to the DME. It caused hesitation and erratic acceleration in my 86 325e. Once I changed it (kind of a pain in the A$$, because the heat of the exhaust nearly welded the old sensor in place, I recommend renting an O2 sensor removal tool from an auto parts store!)

Just my first guess, hope it helps!

Josh W.
'86 325e w/Dinan ECU

[gsrboy171]

samething with my car

the code gave off o2 sensior

how much does it cost?

[race01]

Originally posted by 325eXTATIC@Aug 1 2005, 08:31 AM
have you checked your Oxygen Sensor?

If it has gone bad, it may send mixed signals, or no signal at all to the DME. It caused hesitation and erratic acceleration in my 86 325e. Once I changed it (kind of a pain in the A$$, because the heat of the exhaust nearly welded the old sensor in place, I recommend renting an O2 sensor removal tool from an auto parts store!)

Just my first guess, hope it helps!

Josh W.
'86 325e w/Dinan ECU

[snapback]366588[/snapback]

Thanks. I don't think that I replaced that yet. I'll give it a try and let you know.

[race01]

Originally posted by gsrboy171@Aug 1 2005, 09:45 PM
samething with my car

the code gave off o2 sensior

how much does it cost?

[snapback]366732[/snapback]

Thanks. Your car looks sweet. What kind/size rims are they?

[325eXTATIC]

Oxygen Sensor SHOULD be around $120
http://www.pelicanparts.com/BMW/catalog/sh...s_pg2.htm#item5
Oh, and I would recommend getting this taken care of very quickly because when the O2 sensor goes bad, the engine starts spitting out things like unburned fuel, and other such nastyness which will VERY QUICKLY ruin your Calalytic Converter. If that is the case, I recommend going to magnaflow and getting a universal cat and having a muffler shop replace it for you (the will need to fabricate a 2 into 1 and 1 into 2 adaptor to connect to an aftermarket cat) if you have to deal with emissions wherever you are. http://www.car-sound.com/catalog/universal/940.aspx

Hope This Helps!
Josh W.

[nukeduster]

Originally posted by 325eXTATIC@Aug 2 2005, 05:26 AM
Oxygen Sensor SHOULD be around $120
http://www.pelicanparts.com/BMW/catalog/sh...s_pg2.htm#item5
Oh, and I would recommend getting this taken care of very quickly because when the O2 sensor goes bad, the engine starts spitting out things like unburned fuel, and other such nastyness which will VERY QUICKLY ruin your Calalytic Converter. If that is the case, I recommend going to magnaflow and getting a universal cat and having a muffler shop replace it for you (the will need to fabricate a 2 into 1 and 1 into 2 adaptor to connect to an aftermarket cat) if you have to deal with emissions wherever you are. http://www.car-sound.com/catalog/universal/940.aspx

Hope This Helps!
Josh W.

[snapback]366817[/snapback]

buy a universal metric 4 wire o2 sensor. the bosch ones cost about $80 @ autozone

[gsrboy171]

Originally posted by race01+Aug 2 2005, 05:41 AM--><div class='quotetop'>QUOTE(race01 @ Aug 2 2005, 05:41 AM)</div><div class='quotemain'><!--QuoteBegin-gsrboy171@Aug 1 2005, 09:45 PM
samething with my car

the code gave off o2 sensior

how much does it cost?

[snapback]366732[/snapback]

Thanks. Your car looks sweet. What kind/size rims are they?

[snapback]366804[/snapback]

[/b][/quote]

they are 15's on 215's old school MOMO rims

[gsrboy171]

Originally posted by nukeduster+Aug 2 2005, 10:28 AM--><div class='quotetop'>QUOTE(nukeduster @ Aug 2 2005, 10:28 AM)</div><div class='quotemain'><!--QuoteBegin-325eXTATIC@Aug 2 2005, 05:26 AM
Oxygen Sensor SHOULD be around $120
http://www.pelicanparts.com/BMW/catalog/sh...s_pg2.htm#item5
Oh, and I would recommend getting this taken care of very quickly because when the O2 sensor goes bad, the engine starts spitting out things like unburned fuel, and other such nastyness which will VERY QUICKLY ruin your Calalytic Converter.* If that is the case, I recommend going to magnaflow and getting a universal cat and having a muffler shop replace it for you (the will need to fabricate a 2 into 1 and 1 into 2 adaptor to connect to an aftermarket cat) if you have to deal with emissions wherever you are. http://www.car-sound.com/catalog/universal/940.aspx

Hope This Helps!
Josh W.

[snapback]366817[/snapback]

buy a universal metric 4 wire o2 sensor. the bosch ones cost about $80 @ autozone

[snapback]366836[/snapback]

[/b][/quote]

will the threading nut will be the same??

and the 4 wire type conector will it be the same??

[Celsdogg]

also try pouring some techron in ure gas tank, sometimes that helps clean out injectors, etc. in the absence of a real cleaning. . .

[race01]

OK. Changed O2 Sensor (Bosch $ 120.00). Also changed fuel filter. I've put fuel injection cleaner into tank as well. Still the same deal. Throttle Positioning Sensor? Seems to do it more when first driving it. Cold Start Sensor?

[325eXTATIC]

Originally posted by race01@Aug 4 2005, 04:22 PM
OK. Changed O2 Sensor (Bosch $ 120.00). Also changed fuel filter. I've put fuel injection cleaner into tank as well. Still the same deal. Throttle Positioning Sensor? Seems to do it more when first driving it. Cold Start Sensor?

[snapback]367400[/snapback]

Look up "Hot Soak" on the forum and follow that procedure. Sounds like the injectors are clogged or the valves are gummed up. A good Hot Soak of the engine should open it up a bit (possibly, if the injectors are TOO bad, it is time to replace them though http://www.fiveomotorsport.com/Injector_SetsBMW.asp)

I know mattpark and Bmw1990 have both replaced their injectors with Ford 19# injectors with some level of success, check with them!

Hope this helps!

Josh W

[jackx84]

Hey guys,I've got a 96 328 conv. Yesterday, It started surging on the highway.Not real bad, but to the point you could feel it and see the manifold press gauge (fuel econ) move irratically-about 2 mpg. Idles fine and smooth. any Ideas?(vac leak,fuel press, misfire?) (No emission codes or ck light)Thanks, Jack