2011 chevrolet cruze 1.4l p0171

plainte client:témoin moteur allumé

vérification du\des codes p0171-p0300

au idle le moteur tourne pas rond et une fumée bleu sort de l'échappement

1er étapes une valeur data assez évidente d'un problème short term +35% et long term +35%
ouverture du capot et j'entend une fuite assez évidente



un probleme de pcv

2ieme vérification tsb
#PIP5197C: Possible Oil Consumption - Oil Leaks - Blue Smoke From The Exhaust - MIL - Or Fuel Trim Codes - (Jan 21, 2016)
Subject:   Possible Oil Consumption - Oil Leaks - Blue Smoke From The Exhaust - MIL - Or Fuel Trim Codes
 
Models:  2011 - 2016 Chevrolet Cruze
2013 - 2016 Buick Encore
2012 - 2016 Chevrolet Sonic
2013 - 2016 Chevrolet Trax  
Equipped with 1.4L (RPO LUJ or LUV)

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This PI was superseded to update Model Years and Recommendation/Instructions. Please discard PIP5197B.


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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern
You may encounter a customer concern of excessive oil consumption, blue smoke from the exhaust, MIL or fuel trim codes.

Excessive oil consumption, not due to leaks, is the use of 0.9 L (1 qt) or greater of engine oil within 3 200 kilometers (2,000 miles).

Any or all of the following DTCs may be current or set in history: P0106 P0171 P0299 P0507 P1101 P2096

Recommendation/Instructions
Check the PCV orifice for leaking oil or drawing vacuum at idle thru its external port. (The PCV orifice is an integral part of the camshaft cover). (See picture below).



If the PCV orifice external port is leaking oil or vacuum, replace the camshaft cover assembly.

Clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.

Check for a missing intake manifold Non Return Valve that may have damaged the PCV orifice diaphragm. (See pictures below for inspection procedure).







If the non return valve is not visible as shown in picture, then use a long cotton swab to wipe any excess oil from the valve to validate.

If the non return valve is still not visible, then intake manifold removal for inspection is required to validate.

If the valve is present reinstall the intake manifold. Do not replace.

Properly seated Non Return Valve as viewed with the intake manifold removed.



If the intake manifold Non Return Valve is missing, then replace the intake manifold assembly,

Clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.

If the intake manifold Non Return Valve is seated properly, then perform the following

Inspect the spark plugs for signs of oil fouling.

Engine cranking compression utilizing GDS2.

Cylinder leakage testing utilizing proper tools

Repair any issues with compression or leakage testing.

Refer to the latest version of PI0552 to check the engine oil dipstick and oil fill cap for proper sealing.

Refer to the latest version of PIP4925 to check for any air leaks to the intake system.

Record the crankcase pressure. (Normal crankcase pressure readings are between -11 & -18 inches of water in park at hot idle) / (ESST gage works best, see pictures below for connection of ESST at the engine oil dipstick hole in the camshaft cover ).  

Note: The connection must be made with the engine off. The engine is then started and the pressure reading is recorded.





If the crankcase pressure is in the proper range, clean oil from all induction system components and retest for oil consumption, leaks or DTCs resetting.

If the crankcase pressure is excessively positive, above 0 inches of water (0 inches of HG / vacuum) then a cylinder leakage / crankcase pressure concern exists.

If the crankcase pressure is excessively negative, below -30 inches of water (-2 inches of HG / vacuum) then excessive intake vacuum is being applied to the crankcase, requiring further PCV system testing.

Warranty Information
The correction for this concern may be one of several repairs described above. For vehicles repaired under warranty, please use the appropriate warranty labor operation based on the original cause in addition to well documented straight time.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed



a date dans l'intake y a rien comme la check valve visible alors en attente d'une nouvelle intake et un valve cover
le moteur avait déjà été remplacé a cause qui avait surchauffé et l'intake vient de se moteur qui a surchauffé alors la check ball valve a tu fondu a suivre.........


suite a venir si le problème est résolu

On va en avoir de l'ouvrage avec ces chars en plastique et composante intégrés !

pour ce partage Frank, on a tout pour réparer ce trouble.

un petit suivi de se cas

regarder ici qu'es que le tsb disait de la valve anti retour dans l'intake si elle était présente ou pas et causait le bris du diaphragme dans la pcv valve si elle n'y est pas
et bien voici celle du véhicule en question elle n'y était pas



remplacement par une seconde main et elle est bien présente


N.B: ne pas oublier les tsb dans tout diagnostique


quelques photo supplémentaires  
ici return valve non present

ici return valve present



la finale un BG nettoyage
pn109-110
pn206-208

reset des fuel trim     de retour a la normal

Un autre trouble que notre Frank a résolu

Effectivement les tsb devraient toujours faire parti de nos premières recherches.

Frank a écrit:

remplacement par une seconde main et elle est bien présente

J'ai cherchais ce que tu voulais dire pas ça À force de le relire, j'ai compris que c'était un usagé. Je lisais Main comme principale.

Donc tu as fais un flush moteur avec un BG PN 109. Le PN108 c'est un additif pour Power Steering

Plus un nettoyage d'intake PN206 et un additif d'essence 44K PN 208.

correction faite Yvon 110 le moa additif que j'ai mis

hahahahaha in bonne ''MAIN''