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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 06-25-2015, 05:05 AM
61surf 61surf is offline
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Mein Auto: 1996 328ic
96 328IC low acceleration power all speed's esp up hill

Comments: 1996 328ic http://s1.bimmerfest.com/forums/imag...ies/cursin.gif
Runs rough low power all speed's esp up hill, low tone exhaust pop on decel.
bank1 sensor2 (or) Bank 1 cat eficency code only after 40+ miles 65mph++
1. Bad hose at icv replaced and cleaned icv moves back forth ok, ran smooth aprox 30 miles
2. Replaced ccv and hoses good another 30 miles
3. New plug's NGK BKR6EQUP , bremi boots and fuel filter, both throttle body gaskets no change
4. New maf boot and hoses all ok ran good again for about 30 miles
5. New intake gasket checked replaced all vacuum in around manifold. no change
6. new bremi coils. no change

New injectors today, some more power but still running hard esp up hill and 60 mph++ on highway. car feels like 3rd-4th gear when in 5th on highway
Re did smoke test snapon nitrogen smoke tester no vac
leaks,
My issue is it cleared up ran like a new car two seperate times after icv hose and ccv replacements. Not sure but should rule out the cat"s????
(If you raise rpm at throttle-body air noise it seems alot louder than normal)_a__a2_
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  #2  
Old 06-25-2015, 06:05 AM
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dc_wright dc_wright is offline
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Mein Auto: '96 328iC, '04 325Ci
Certainly has the symptoms of at least a partially blocked CAT.
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Old 06-25-2015, 07:37 AM
61surf 61surf is offline
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Mein Auto: 1996 328ic
That's exactly what it feels like but why did it clear up after the vacuum repairs???
It felt like the throttlebody was 1/2 closed like a partially stuck choke on an old carb car, then open after the repair for 3-4 hours..........

That's why I keep thinking vacuum. Poss Fuel vacuumor egr vacuum???

Cats are 1500+++++ and aftermarket not so good reviews.............. a lot of money to find it was something like a leak someware after the purge valve thing under the maf
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Old 06-25-2015, 08:13 AM
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dc_wright dc_wright is offline
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Mein Auto: '96 328iC, '04 325Ci
You try to eliminate everything else first, then start haunting the salvage yards for a CAT section.
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Old 06-25-2015, 08:26 AM
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southpark11235 southpark11235 is offline
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Mein Auto: 1999 BMW 323is
^Why not just run open header to test and see if the cat is clogged?
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