Last post on Jul 09, 2013 at 7:15 AM
You are in the Isuzu Trooper
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Isuzu Trooper, SUV
#10585 of 11966 Stalling problem.
Mar 24, 2005 (1:02 pm)
My Trooper now makes me outrageous. It developed the following problems: (1) the engine stalls when I shift it from P to R or when my foot is off gas pedal. (2) when the engine speed reach 3000 rpm, CEL shows up, (3) after that, the engine idle speed stays at 2000 rpm level and the stall problem disappears. (4) when I disconnect battery cable and reinstall it, CEL become off and the idle speed comes back to normal. But the problem (1) happens again and new cycle begins.
I sent the car to the Bill Stillwell Isuzu in Downers Grove, IL and they told me I need a new fuel pump. Before I send the car back there again, they went out of business. So I have drive 20 miles to a Isuzu dealer at Orland Park, IL. This time, they gave me a even longer list:
(1) Fuel pressure regulator
(3) EGR service
(4) tune up
(5) throttle service
(6) Injector service
The total quote is $1290 plus tax. Ironically, I just had the 90K service and got new spark plugs and fuel injector serviced 3 months ago. I think maybe I should seek second (or third) opinion.
My fellow Trooper fans, do you guys have any idea what is the real cause of the problem?
#10586 of 11966 Re: Stalling problem. [peterisme]
Mar 24, 2005 (4:54 pm)
Sounds like there digging into your bank account, big time! And, yes, I would get a second opinion. But, please be specific, Peter . . .
First of all, what year is your Trooper? For what it's worth, I've never heard of a fuel pressure regulator going bad, except in an old BMW I once owned. But, assuming your Trooper even has one, it may well be a possibility.
Second, what "distributor" are they talking about? As most vehicles, Troopers haven't had an ignition distributor in years. If your dealer is referring to a fuel distributor, I seriously doubt that is the cause of your problem, assuming your Trooper even has one.
EGR service? That definitely could be your problem. Plugged EGR valves/lines (and dirty PCV valves) can create a host of problems, as documented all over this board.
Tune up? What are they including in that? Spark plugs and F/I service pretty much does it. You didn't mention who performed your tune up, or what type of spark plugs they installed, or what else they might have done. Improper plugs on many Troopers create another host of problems.
Throttle service?? I've seen other people mention that. What the H... does that mean?
Injector service?? Why?? You said you just had that done!
Get a third and fourth opinion if necessary. Sounds like they're rippin' you off. Get informed, man, and ask questions!
BTW, don't cry about having to drive 20 miles to a dealer. 20 miles doesn't even get you into town in Houston!!
#10587 of 11966 ammendment to post #10584
Mar 24, 2005 (5:58 pm)
In my previous post, I alluded to cleaning the PCV valve. While this may be an issue, in my post, I meant to refer to the EGR valve, not the PCV valve.
#10588 of 11966 Re: Stalling problem. [silverghost]
Mar 24, 2005 (7:02 pm)
Throttle service may mean cleaning the throttle body which gets dirty from the closed circuit breathing.
When I pulled the intake hose to the throttle body on my '00, a ridge of deposits had built-up around the butterfly / throttle plate preventing it from opening fully. I was out of sensor safe carb cleaner so I repeated actuated the throttle to scrape off the deposits. If there would have been a throttle cable, I probably would have noticed the throttle sticking. The side benefit is that my slight engine ping disappeared completely over the past 6 months - which makes sense.
#10589 of 11966 Re: Stalling problem. [troop2shos]
Mar 24, 2005 (8:00 pm)
Hi, silverghost and troop2shos, thanks for your comments. It is a 99 year model S. It keeps bugging me for a while. The problem began last spring, it was the CEL. At that time nothing else was wrong. I visited my local ISUZU deal for 3 or 4 times. First they changed Intake Manifest gasket. But the CEL came out the next day, later they asked me to dry better gas, so I tried any brand I can find in Chicago, later drive to Indiana to buy gas. But the problem was still there. The last time I visited them, they asked me to change fuel filter and fuel pump. I changed fuel filter. When I made my decision to change the fuel pump (they asked for $900), they went out of business. So I have to find another dealer 20 miles away. This time the sticker shock is even bigger.
So far, the intake manifest gasket was changed twice (at 20K and 80K). I also had 90K service at my local mechanic. they also changed spark plugs (they claim they are platinum) and serviced fuel injector).
According to Edmunds.com, the trade in value of my car is about $4000. Yeah, I am considering get rid of this car. I donít think it is wise to through in $1000 for the repair that cannot guaranty solving the problem. But my wife had a bumper scratch accident with the Trooper last winter, I believe, the trade-in value I get should be less than that. We just got a Toyota Sienna in December. Now my wife tries to persuade to get a Camry. As you know, Trooper owners are the people who don't want to be mainstream. But after all these troubles with this Trooper, I have to think it twice before I get a new car.
#10590 of 11966 Re: Stalling problem. [peterisme]
Mar 24, 2005 (8:40 pm)
The Trooper is sensitive to using specific spark plugs regardless if they're platinum. Some use Denso but I've run NGK for over a year with no problems. Since you report a high idle condition, I would pull the intake hose from the throttle body (or if you can check the throttle linkage outside the body) & make sure the throttle plate isn't sticking (not closing properly could cause a stall at idle) & it's a simple fix if it is. The other items mentioned in your list don't make sense / don't apply / NA with the conditions you report...don't trust this dealer as previously mentioned - find another shop (even an independent) if you need another opinion.
I'm not one to be mainstream by owning a '70 Rover 3500s, '75 99 Saab EMS, 2 SHO's, my current Trooper & '04 Subaru Forester XT, to name a few...
#10591 of 11966 Yokohama G051 265/70R16 MPG
Mar 25, 2005 (3:34 am)
I was expecting a bigger MPG loss going with these 41 lb. tires. I seem to be getting 1/2 MPG less around town (certainly no worse than that) and no measureable difference on the back country 55MPH highway driving. I haven't had it on the interstate long enough yet to check MPG difference at 70+ MPH, but I expect that at 70+ MPH, the lower engine RPMs might give better MPG than the smaller tires at least for steady long range trips.
Two more weeks or so left in the 30 day "free" test drive to decide to swap these for Revos. So far, without any big plans for off-roading, I still thik I'll keep the G051's
Mar 25, 2005 (6:57 am)
thanks troop2shos. Can you tell me where does "inntake hose from the throttle body" located? Thanks!
#10593 of 11966 Re: To :[troop2shos] [peterisme]
Mar 25, 2005 (6:22 pm)
Follow the intake hose from the air filter housing to the throttle body under the appearance cover which just lifts off its studs. Once you remove the hose clamp & move it out of the way, you'll see the brass throttle plate inside the throttle body (throttle lever rod enters through the left (driver's side) of the housing & opens / closes the butterfly valve / throttle plate. You can manually rotate the spring loaded rod to check for any extreme binding prior to removing the intake hose for a visual inspection if you choose.
Mar 26, 2005 (5:45 am)
It could be the intake manifold gasket too? That is about $129 repair.