Question about 1995 Nissan Sentra

1 Answer

Nissan Sentra GA15DE engine - misfiring at random during drive

I have replaced two throttle chambers and on the third one now. However, after installing this brand new throttle chamber, the engine would misfire randomly when driving along anywhere above 80kmh. When it happens, the misfire can be very mild to jerky accompanied by lots of white smoke from the exhaust. After a few minutes, it clears and the engine is back to normal and runs smoothly.

Over a 200km distance I travelled today, I have noticed the misfire would start especially when driving up on a sloping road. It also happens at other times even on level roads and at random. Brought it to the mechanic, changed new spark plugs, fuel filter and diagnose with Consult-II but still the problem won't rear its head in the workshop.

Inspecting the spark plugs they appear clean and normal, not oily or soothy.

The white cloud of smoke, is that unburnt fuel mixture? If it is so, could the new throttle chamber be faulty or the distributor / coil is faulty?

When my two previous throttle chambers acted up, the engine would spatter and belch black smoke and die as soon as the engine warms up to normal operating temperature. The car then would be undriveable.

The MIL light was not even lighted like in the previous incidences.

Would appreciate if anyone have had the same experience and share what to do to fix this problem.

Warm Regards
martnewn

Posted by on

  • 1 more comment 
  • martnewn Oct 14, 2008

    Latest update. This morning I checked the engine oil and it had lost around 1.5 ltrs. All the white smoke I mentioned yesterday must have been the engine oil burning up. Question is how did it get into the combustion chamber? I went to another mechanic for a second opinion and after a test drive he reckons it could be some piston ring damage or worn valve seals. The engine has done some 270,000Km or roughly 170,000 miles by the way and is regularily maintained. It has been on fully synthetic oil from new.



    The cylinder head has to come off for an assessment of the problem. Will update you guys next week of outcome.

  • stupid_kiwi Dec 05, 2008

    I have similar problems on 4 different cars (I own a rental fleet) but it all goes back to either dry-solder joint or water temp sensor.
    Check this out www.micra.com.au/technical-articles/cg13de-throttle-body-resoldering-guide.pdf
    and http://newsgroups.derkeiler.com/Archive/...
    Did you change the throttle body new or reconditioned?
    The smoke perhaps is unrelated to this problem (may be true piston ring is broken)

  • martnewn Jan 02, 2009

    Sorry folks for the belated follow up report. The cylinder head was taken off and couldn't find any fault. Anyway, just gave it a valve lapping job and changed new valve seals.



    The cylinder bores were inspected and appeared in good condition, smooth and no scratches discounting broken rings. To be dead sure, the pistons were removed and the rings were sticky.



    This may explain why sometimes it suffers a blow by. We were also suspicious that the rings maybe weak so decided to change them. So we ended up reboring and fitting an oversize ring and piston. While at it, also replaced all rubber hoses especially those behind the engine and under the inlet manifold which is impossible to get at otherwise. Also the timng chain tensioner pad had worn thin and was replaced.



    The engine has been runnning smoothly ever since the overhaul and no more blow by so far.



    I think the sticky rings were due to the fact that the car was driven by my wife who hardly drives hard or exceed 100kph.



    I have also now changed from using Mobil-1 fully synthetic motor oil to Shell Super Helix a semi-synthetic oil.



    Also thanks to Kiwi for the articles on resoldering dry joints on throttle chamber. I have two old ones and will take apart the cover to check if mine was a dry joint problem as well.

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a 1995 Nissan Pulsar and had the same problem with the engine just as you explained, with the white smoke and backfiring, the problem was the pcv valve had failed and the oil was being sucked from it through the vacuum pipe attached to it. the oil would go into the inlet manifold and go into the combustion chamber. I had practically changed everything around the engine block before finding the problem. And also, the MIL light never came on.

Best Of Luck.

Posted on Sep 06, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My 1998 Nissan Sentra service engine soon light is flashing and idling rough what does this mean I need spark plugs and tune up?


it can be a number of things ---have vehicle scanned a blinking check engine usually means a misfire with 1 or more cylinders most auto stores offer this service for free --with misfire can be plugs -coils-wires-bad gas --throttle body fault--fuel delivery problem etc

Sep 30, 2016 | 1998 Nissan Sentra

1 Answer

What causes a GA15de engine to pul back power whenever the ac is on


Try replacing your fuel filter. Overtime fuel filter get clogged and block fuel

Jul 09, 2014 | 1995 Nissan Sentra

1 Answer

Nissan Sentra 2005 lags in changing 1st to 2nd gear


You need to have the systems computer tested for fault codes, that is the very 1st thing that needs to be done. If they rebuilt the transmission for $900 they did not replace very many parts or do a through job, the average cost is more like $2500.00

May 17, 2012 | 2005 Nissan Sentra

1 Answer

Hello, I have a 2004 nissan sentra 1.6L, manual trans with 130K, good shape. Recently it has started to buck occasionally, usually in 2nd or 3rd gear. This became worse yesterday. Plugs are new (months),...


is the check engine light on? o2 sensors will set an engine code as well as set for lean or rich conditions. being a 2004 model if it is an engine misfire condition this also should set an engine code. most likely with the symptoms you have you have a plug wire getting a bad spot in it. as the engine gets hot the plug wire will cause an engine misfire.

Jul 27, 2011 | 2004 Nissan Sentra

1 Answer

Random cylinder misfire detected as per auto zone that had my service engine light on, I know that one of the spark plugs is real hard to come out, so could it be that particular plug


Hi:
Most likely, random misfires are not caused by one plug. Usually it is a common item, like an ignition module, coil, or something else that affects all spark plugs.

Dec 15, 2009 | 2005 Nissan Sentra

3 Answers

Computer box for Nissan Sentra 2008 GX


possibly. have you changed all your filters? check air filter and throttle body. may be ruined from the water. the throttle body can be cleaned with a fuel injection spray. does your check engine light come on?

Oct 15, 2009 | 2008 Nissan Sentra

2 Answers

Lost of pwer


Check your idle air control valve

Jul 14, 2009 | 1995 Nissan Sentra

1 Answer

2003 Nissan Sentra/standard transmission, ran fine until recently. Began jerking around randomly and would lose power out of nowhere. Stops doing this after restarting a few times. AutoZone said it needed...


try unplugging the mass air flow sensor. it's between the air filter and the engine throttle chamber. it has an electrical connector. if it idles fine, you need a new MAF sensor.

Jun 08, 2009 | 2003 Nissan Sentra

2 Answers

Compression test Information


Don't have a spec, but typically, crank the engine 5 cycles, compression greater than 110 is good. And the lowest should be within 20% of the highest..

May 18, 2009 | 1996 Nissan Sentra

1 Answer

2004 nissan sentra 1.8s misfires


You might need 2 change the spark plugs... It's time for a tune up.

Sep 03, 2008 | 2004 Nissan Sentra

Not finding what you are looking for?
1995 Nissan Sentra Logo

1,473 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts

yadayada
yadayada

Level 3 Expert

61249 Answers

Phil Lovisek
Phil Lovisek

Level 3 Expert

705 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

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

Answer questions

Manuals & User Guides

Loading...