Question about Cars & Trucks
Anyway, it's a 2001 Isuzu Trooper with a V6 engine -- 3.5 liter, I think. The engine suddenly shuts off at seemingly random times, though so far never at highway speeds. When this happens, it will eventually start right up again after 15-30 minutes, although most recently I was able to restart it after only a minute or two. So far the shop has replaced the ignition module (electronic ignition control), the throttle body, the camshaft position sensor, and the crankshaft position sensor. None of these repairs has solved the problem permanently. I don't know if it's relevant but I started having this trouble right after they did a bunch of other work on the car. At that time, they replaced the timing belt, the timing belt idler, the timing belt tensioner, the camshaft seal, crankshaft seal, the PCV valve, and the water pump, among other things.I can't help but wonder if something got messed up when they did this work, which caused the problem I'm currently having -- but I have no way of knowing.
With all this work having been done they may have left some connector loose or disconnected entirely..whatever it is.. its getting hot and shutting down to cool off..
Posted on Dec 25, 2013
Testimonial: "Thanx, I sent him this info and will see what he thinks and forwarded your suggestions too. And suggested that he also contact you directly, as this will most likely work better, but he isn't the mechanic in the family like I always was for a good part of my life. So, that is why I am trying to help out here a bit, to sort of push things along :)"
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Posted on Jan 02, 2017
SOURCE: timing belt
You obviously need to replace your TPS, and you may need a new belt tensioner as well. On these cars the timing belt setup is not about no 1 cylinder being top dead center. Here are the proper steps to do a timing belt on this vehicle:
To change the timing belt first place the right side of the vehicle on a jack stand and remove the right front tire. Remove the plastic cover inside the wheel well to expose the harmonic balancer. Remove the serpentine belt (standard 3/8" rachet will set in the belt tensioner to relieve tension). Remove the harmonic balancer (19mm). Place a jack under the engine on the right side of the vehicle, then remove the engine mount from the top of the fender well, (17mm deep well socket and 17mm wrench required) it is not necessary to remove the mount from the side of the engine. Remove the timing cover, (10mm) it has 2 nuts. Loosen the timing belt tensioner, (10mm) then pry it away to relieve the tension. Slide the timing belt off of the cam gear.
To position the new belt, the cam gear has a arrow on it, and the cylinder head has a small dot. Align the arrow with dot, and make sure it is aligned (the arrow must point up). The crank gear has a notch and the engine has a groove to align the notch. Again, make sure the notch and groove are aligned (they again will be up). Place the new timing belt in position around the crank gear, the water pump and belt tensioner and leave the slack at the top. Again relieve any tension from the belt tensioner, and slide the belt on to the cam gear. Place a slight bit of tension on the belt and tighten the belt tensioner. Use the 19mm bolt from the harmonic balancer and turn the engine 2 complete turns and verify that the cam gear and crank gear are in their proper positions and aligned with the dots and notches. After 2 complete turns of the engine, and verifying everything is still aligned, re-assemble in reverse. No further adjustment is necessary.
Note:There is no timing adjustment for this vehicle, and if you are not properly aligned on the cam gear and crank gear it will not run properly.
Posted on Apr 29, 2009
I had same problem on my 2001 model about 2 years ago, too. I just replace the Fuel pressure regulator ($50) and the problem fixed. Trust me on this, don't waste your money on changing anything.
Posted on Jul 15, 2009
Sometimes you must install the timing cover temporarily with the crank pulley to ensure you are at true Top Dead Center line up the notch on the pulley with the pointer on the timing belt cover or pointer on crankshaft cover I had a problem with a dual cam Honda in which the marks on the engine block where slightly off. you must ensure that both intake valves and exhaust valves are shut one cylinder #1 by turning the cams in the appropriate direction, from your description of the situation it sounds like when it runs poorley it is off by one tooth, when you move forward a tooth it runs but poorly make sure you are moving both cams if equipped with dual cam, both cams should be in the exact same visual location in other words all valves completly shut, be careful not to move lower shaft after lining up the crank pulley to cover pointer marks, after resetting turn the engine over two full turns then recheck all markers.
Posted on Aug 03, 2009
the computer may need to be reflashed. if it is running then it is not a bad sensor. either of those being bad would cause it not to run.
Posted on Aug 08, 2009
Start with the simple and replace the fuel filter. The fuel filter should be replaced every 15,000 miles or once a year to ensure the fuel system is running 100%. Auto Zone will have the fuel filter and can give you the step by step instructions to getting the job done with common tools. If it's the fuel pump failure, you have not gotten the car restarted. Good luck and keep me posted, be glad to know you got your car running 100% again soon and please rate.
Posted on Jan 11, 2010
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