Question about BMW Z3

1 Answer

My 1997 BMW Z3 2.8L Manual is experiencing poor acceleration under load at around 3,000 RPM and sounds as though it is pinging. I have changed gas to Chevron premium and added techroline concertrate

I have changed gas to Chevron premium and added techroline concertrate to the last 3 tankfuls, but the problem has become much worse. Now the car has lost what feels to be about 70% or more of its power and is on the verge of being unsafe to drive on city streets the acceleration is so bad, it also started to buck and surge at one point when trying to accelerate in 3rd gear. the car recently threw P0420 and P1423 trouble codes. I suspect that the catalytic converter may be clogged but have no way to verify that assumption. Do you have any thoughts?

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • BMW Master
  • 14,585 Answers

Pull the 02 sensor in front of the catalytic converter (between the engine and converter) or loosen the exhaust pipe at the exhaust manifold. This will give the engine breathing room, if the converter is clogged. Power will pick up dramatically. Also a bad converter will cause an enormous amount of heat coming out of the tail pipe. Don't touch it. Normally you could grab the tail pipe for a few seconds before it got too warm.

Posted on Nov 11, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad
  • 5 Answers

SOURCE: engine surging , won't accelerate over 3000 rpm ! IS chocking is like is not enogh gas

Do you have a check engine light with this?
What can happen is a code has caused the engine to protect itself. For example in a low coolant situation when the engine heats up too much, the engine can Knock causing an Engine Knock fault.
If that occurs you will recieve a fault for each of these items. Fill the engine with coolant. Then reseting the code will let your engine accelerate normally.

Posted on Feb 10, 2009

Pattods
  • 116 Answers

SOURCE: Surging under acceleration

Sounds like the engine is being restricted by something. Here's the three basic things an engine requires to run correctly. Spark, fuel, and air. So, in this situation, I'd definitely recommend that you check the air filter. If the air filter is dirty and restricting airflow, the engine will actually hesitate under full throttle as it isn't able to get the right amount of air to make the correct fuel to air mixture.

If this isn't the problem, then I'd check into fuel delivery. First things first would be a fuel filter. This can have a serious impact on the performance at full throttle. If the filter isn't letting enough fuel into the engine, then it's not going to be able to run correctly at full throttle.

Try those two first, if they don't seem to make a difference, I'd then check into the mass airflow sensor, and possibly the fuel pump/fuel delivery (fuel injectors or carbuerator). Something is definitely restricting that engine, and I'd find out what it is.

Posted on Sep 10, 2008

motor1258
  • 6674 Answers

SOURCE: '99 Accord: P0420 and Sometimes Engine Hesitation & Rough Idling

First thing I'd try is some "heet" or similar additive in tank to remove moisture, then refill with gas from a busy station & drive it for a while and see what happens.

Posted on Jan 02, 2009

  • 184 Answers

SOURCE: '99 Accord: P0420 and Sometimes Engine Hesitation & Rough Idling

If the converter is failed (i.e. plugged) it can cause drive-ability problems (i.e. the engine can't get the exhaust out like it normally can). FYI, http://p0420.com

Fix the known P0420 code first, then if the rough idle, etc continues, continue diagnosing. IMHO, don't worry about the MAF, etc. until you fix the "known" problems.

Posted on Apr 15, 2009

emissionwiz
  • 76164 Answers

SOURCE: 1997 Ford windstar Low power and very poor

35 is low fuel pressure, should be around 40-44 PSI and 46-50 PSI under a load, replace the fuel filter it may be clogged.

Posted on Oct 21, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2003 Mitsubishi lancer 2.0 ralliart. Complete loss of power under wide open throttle between 2,000 - 3,000 rpm. Car idles fine and continues accelerating after 3,000 rpm under wide open throttle just fine....


oxygen sensors buddy, and there is two of them. one above the engine and under. you have to cut it enough to where you can splice and re wire another sensor on.

Feb 23, 2013 | Cars & Trucks

3 Answers

7.5l MFI/SFI timing (?) problems


Hi, you describe a chugging even on moderate hills, is your transmission shifting properly? It sounds like it's stuck in overdrive. Or a plugged injector or two that maybe push out fuel OK in warm up mode but not after. So if your transmission is downshifting when is should and you still have no power, I would have the injectors checked out. Good luck, chuckb

Apr 06, 2009 | 1994 Ford F250 Supercab

1 Answer

Sluggish acceleration, frequent jerking and engine knock at high RPM


Sounds to me like the timing is off! it COULD be bad gas though! run that tank through, and refill, then see how it feels!

Apr 04, 2012 | 2002 Ford Mustang

1 Answer

My 2003 Olds Silhouette pings with every gas octane. under load or not. Have any idea? It is not thriwing out a code and it has a new PCM.


Ping only occurs under load. If there is a noise present when the vehicle is not under load it is not ping and possibly something more serious. Here's what I recommend. Call around to some local shops and see if they will listen to a noise and how much it would cost. And experienced ear will be able to tell what exactly the noise is or at least narrow down the possibilities. Once you know what the noise is post it in this question and I'll see if there is anything I can suggest to help you out. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Mar 13, 2012 | 2003 Oldsmobile Silhouette

1 Answer

Idling At 3,000 rpm


you have a open vacum line.check your brake boster..

Jun 10, 2010 | 2000 GMC Sierra

1 Answer

Rpm and acceleration problem


throttle sensor fault. might be cleanable if removed. also could be a damaged idle valve, might be staying open this cal also give high revs. and tap and it will go down as its sticking. acceleration is the throttle sensor i may have blank spots. removing it and spraying in the switch breather hole and shake the cleaner around and turning it at the same time should clean the sensor. then shake and leave to drain out the cleaner. idle valve you will need to remove it and clean ti with some carb cleaner and a brush like toothbrush, clean it thorley out push the pin in and out to make sure its not sticking at same time spray it. then when clean leave to dry. then refit them. hope this helps

Jun 24, 2017 | 1999 BMW 318 ti

1 Answer

I have a 2002 grand marquis,140 thousand miles...i change my oil on the regular,i take good care of the car..my problem is on my last oil change i noticed a slight tapping noise like the valves where...


a knock sensor is basically a resistor and a spring, and what it does is it reduces valve ping. Valve ping is when the fuel is not properly burned and tries to explode before the valve is fully closed and it will make a pinging noise when under load or at higher RPM. If the sensor is bad it can cause detonation, detonation is when the fuel explodes before the valve is closed and can cause a cracked, or exploded piston, bent valves etc. Your problem does not sound like that of a bad knock sensor, predominantly you will only hear the "ping" under load and not at idle and if it was bad your check engine light should be on. this sounds more like a rod knock. change the oil again and use only AMSOIL and an amsoil filter, amsoil is proven to last longer than any other oil, 600,000 miles without a change, or a filter change.

Feb 05, 2010 | 2002 Mercury Grand Marquis

1 Answer

Slipping clutch?


it sounds like thr clutch has burnt out does it smell when you are drivind if so you need a new clutch , pressure plate & through out bearing good luck

Mar 15, 2009 | 2004 Volkswagen Passat

2 Answers

SEVERE LOSS OF POWER


check for a failed cat converter blocking the exhaust system

Apr 07, 2017 | 2003 GMC Envoy

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

106 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Frankie B

Level 2 Expert

65 Answers

Fred Sops

Level 2 Expert

272 Answers

Doberman

Level 2 Expert

254 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...