Question about 1998 Porsche Boxster

1 Answer

1998 boxter idle is perfect ,,missfire /backfire when rpm is incr

1998 boxter runs perfect at idle ,,when rpm is increased engine starts too missfire and wont reach full power ,,,have changed the spark plugs and the air filer ,this has made no difference...

Posted by on

  • Anonymous Mar 16, 2014

    engine will rev normally with progessive throttle but open the throttle quickly and the engine missfires badly.Feels like it has no fuel.

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Master:

    An expert who has achieved Level 3.

  • Master
  • 416 Answers

It might be injectors and/or fuel filter clogged.
Try to use injector cleaner (ask for recommended heavy duty in auto store) also I would check maf sensor.
Also misfiring/backfiring is a sigm of worn/damaged distributor cap/wiring
Please kindly let me know if this info was usefull/useless for you or you need more info
Good Luck

Posted on Feb 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Engine wont catch


Catch?
cranks fast
starts every time.
idles fine hot or cold , or both? hot idle not too fast.
i race engine , in park and neutral, I can hit 3500 rpm easy, can you.
i release brakes, (brakes are not packed in ICE , are they?)
I select 1gear or reverse (A/T or m/t)
the car moves or dont move, which is it, my guess catch = no move at all.
I try to drive, i look at RPM and MPH
RPM moves up and MPH track.
track means they both move in a linear progression.
RPM rises and for all RPM increases MPH also increases.
does it?
if all that works then we have an engine power issue.
weak on hills?

Jan 03, 2014 | 1998 Jeep Cherokee 4WD

1 Answer

My 1998 for escort wierd problem with idling


When a crankshaft sensor has failed or is failing, certain timing problems will arise in engine function. The engine may start normally in some cases, but will cut off after a few minutes (or seconds) of operation. More than likely the engine will be unable to start at all. Since the crankshaft sensor is responsible for engine timing, the driver may experience engine backfire or irregular rpm function, if the vehicleicon1.png starts at all.

Mar 06, 2013 | 1998 Ford Escort

1 Answer

92 NISSAN WITH BOGGING AT 2800 3500 RPM AND AT LEVEL SPEED 4CYL AND 5 SPEED


For this types of problem,there are few help inks to troubleshoot the problem.Click the link below to go through the troubleshooting procedure to resolve the issues :----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html-----------van idles rough? http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html
--------------runs lean and idles rough? http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html
-----------Car still runs Rough after tune up? http://howtobyme.blogspot.com/2011/12/car-still-runs-rough-after-tune-up.html
------------Idle flair is noticed on car? Rough idle? car will not idle? Erratic idle speed? http://technoanswers.blogspot.in/2012/02/idle-flair-is-noticed-on-car-rough-idle.html
----------High rpm in neutral? Inconsistant high RPM in neutral? http://technoanswers.blogspot.in/2012/02/high-rpm-in-neutral-inconsistant-high.html
------------Engine Backfires? http://technoanswers.blogspot.in/2012/02/jeep-backfires.html----------- Nissan stalls and bucks on Acceleration?

http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

-----------
Nissan Pathfinder Backfires? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-backfires.html
---------How to adjust rpm? http://schematicsdiagram.blogspot.com/2011/12/how-to-adjust-rpm-on-2009-dodge-charger.html
------------Engine cuts out at 3000 RPM? http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html
----------This will help.Thanks.

Feb 17, 2012 | 1992 Nissan Pickup

3 Answers

Can you tell the location of the idle speed valve on a 1998 escort gti please


You will find idle speed controllers in the area of the throttle plates. In order to work, air must bypass the throttle plates.

Nov 01, 2009 | 1998 Ford Escort

2 Answers

1998 k1500 5.7l 105a alternator. replaced


Now change the sulfated batery for a new one.
Vitally

Sep 09, 2009 | 1998 Chevrolet K1500

1 Answer

What's the rpm specification on idle and park, reverse and on drive


warm idle about 750 rpm. no difference in park or idle if its warm. cold idle will be closer to 1000 rpm till sensor detects temp incr.

Jul 17, 2009 | 1993 Chevrolet Suburban

1 Answer

RPM rev up and down at idle/ backfires/


Dont have the time right now to outline all the details, but I will bet that the timing chain is worn 4.0 engine?? Also I'd guess the problem started at about 160-170k miles.(how close am I???)

Jan 16, 2009 | 1998 Jeep Cherokee

1 Answer

Truck starts and then stalls out not idles or push down the gas wont rev up to go when push down the gas


I have a similar problem. The engine run fine at idle but hesitate if increase the rpm with no load. If I pump it hard it is ok. I am not able to find the problem yet.

Aug 06, 2008 | 1998 Chevrolet K1500

Not finding what you are looking for?
1998 Porsche Boxster Logo

Related Topics:

551 people viewed this question

Ask a Question

Usually answered in minutes!

Top Porsche Experts

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

yadayada
yadayada

Level 3 Expert

60541 Answers

Dave  C
Dave C

Level 3 Expert

1050 Answers

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

Answer questions

Manuals & User Guides

Loading...