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Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 12962
Experience:  Have owned a repair shop for 25 yrs.
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2001 Isuzu Trooper 4x4. since 56K miles I recognize vehicle

Customer Question

2001 Isuzu Trooper 4x4. since 56K miles I recognize vehicle uses a quart of oil every 400-500 miles.. told computer shuts off cylinders to conserve gas.. was there a computer reprogram fix to solve issue.. ie random shutoff of spark to cylinders.. was there a computer fix/reprogram to resolve.. ie random shutoff of spark to cylinders
Submitted: 1 year ago.
Category: Car
Expert:  Tim's Auto Repair replied 1 year ago.

tims auto repair :

hi

tims auto repair :

please explain your question?

tims auto repair :

is your problem..that it is using oil/

tims auto repair :

?

Customer:

statement: does use oil every 4-500 miles on highway.. seals and rings seem good when I pulled plugs..

Customer:

question: is there a electrical reprogram for computer? to make electrical random?.. like old NorStar problem of non-random computer program

tims auto repair :

no

tims auto repair :

not on this engine

tims auto repair :

the plugs do not have anything to do with oil usage

Customer:

so, was there ever a fix?.. do others have same issue?

tims auto repair :

the plugs do not have anything to do with oil usage

tims auto repair :

please explain....are you talking about it using oil

tims auto repair :

?

tims auto repair :

the computer has nothing to do with it using oil

Customer:

understand.. but no evidence of hot/dirty cylinder

Customer:

indicating bad valve seal or piston rings

tims auto repair :

how long has it been using oil like this

Customer:

what i had heard was when go on highway and low fuel demand then engine goes down to ~ 4 cylinders to conserve and rings were not hot allowing oil to pass

tims auto repair :

no

tims auto repair :

how long has it been using oil like this

Customer:

since I noticed at 56K miles between oil changes as started knocking (low 2 1/2 quatrs).. Isuzu said ok.. did nothing on warranty .. wanted to run cleaner thur for valves.. at 194K and runs great yet but still uses oil and have to watch when on road trips

tims auto repair :

ok

tims auto repair :

it has 194k on it now?

Customer:

just thought they may have finally reprogrammed and fixed issue with variable electrical change .. ie alternating plug charge to level..

Customer:

yep, still runs great.. change oil every 4K since I've owned.. same characteristics.. never got worse

tims auto repair :

ok

tims auto repair :

there isnt really anything short of rebuilding the engine you can do for this oil usage problem

Customer:

I know/ I know.. count blessings, but don't think rings/seals as characteristics same.. doesn't seem to need a full teardown

tims auto repair :

what weight oil do you use?

Customer:

have always used Valvoline Mix blend.. started Valvoline mixed blend 15-40 MaxLife

tims auto repair :

ok

tims auto repair :

here is what you can do

Customer:

above at ~75-85K

tims auto repair :

remove and replace/clean the pcv valve

Customer:

tried full synthetic for about 5K and never helped

tims auto repair :

it may be letting oil to be pulled into the intake

Customer:

changed PCV at about 185K

Customer:

can change again

tims auto repair :

and or/you can ue a little thicker oil[maybe 20w50] to slow down the oil usage

tims auto repair :

REMOVAL PROCEDURE

1. Remove the vacuum hose at the PCV valve.

2. Slide the clamp back to release the hose.








37_sz01troop_wm_6e-688c.png
Full Size Image


3. Pull the PCV valve from the rubber grommet in the right valve cover.

INSTALLATION PROCEDURE

1. Push the PCV valve into the rubber grommet in the left valve cover.








38_sz01troop_wm_6e-689a.png
Full Size Image


2. Install the vacuum hose on the PCV valve and secure the vacuum hose with the clamp.

Customer:

ok.. just trying not to gunk up valve covers with to heavy/surapy (spelling) oil

tims auto repair :

other than this,,,,there is really nothing you can do.....just keep check on the oil

tims auto repair :

i would think the problem here is an aligned piston ring..maybe from the factory..

Customer:

ok.. thanks.. anyway now I know they never fixed issue before they went out of busn

tims auto repair :

this problem isnt going to hurt it,,but,,it will always use a little oil

tims auto repair :

check that pcv valve

Customer:

yep.. have always watched.. better in town driving at ~1200/quart.. highway at 4-500/quart.. so don't drive out elk hunting as cost to much for oil.. ok.. thanks

tims auto repair :

you are very welcome

tims auto repair :

Please RATE my answer by clicking the RATINGS button, so I can get credit for my work,,the [BAD SERVICE] and [POOR SERVICE] rating does not give me credit].i don't receive commission if you give a less than 3 star/smiley rating ..I'm not always going to be giving you good news,so please don't let this stand in the way of you accepting my answer.it does not cost you more money.we will still be able to communicate,,.please understand,i can not see,hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated!if you are not satisfied with my answer,please do not leave bad feed back,i will gladly opt out and let another expert handle the question.if i have sent any diagrams,please print them.they will only stay on here for an hour or so...sometimes you may need to right click the image,then save picture as]to save it to your computer so you can open it with your picture program...PLEASE ASK IF YOU NEED MORE HELP


 

Customer:

sure.. tahnks for the help!

tims auto repair :

you are very welcome

Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 12962
Experience: Have owned a repair shop for 25 yrs.
Tim's Auto Repair and 5 other Car Specialists are ready to help you

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