1991 Isuzu Trooper poor power

SPDAREDEVIL1063

MEMBER
1991 ISUZU TROOPER
6 CYL
4WD
MANUAL
105,000 MILES

I traveled to florida last week on kind of a non schedulded trip so I didnt have time to check my car such as the oil or tire pressure ect. Anyways on my way home I noticed a noticable decrease in power. When I got home I checked the oil and it was very low. It did read on the dipstick about halfway up the spiraled part. But my car never ran hot and the oil pressure and temp. Was fine. I changed the oil and used high mileage synthetic and changed the spark plugs and wires, cleaned and re-oiled the air filter yet it is still running badly. And the other day after I changed the plugs I drove it home about 25 miles or so and I stopped at the bank and once I came back out it would turn over but it wouldnt crank. I kept holding it down and it finally picked up and cranked. So I dont know if I have damaged the actual internals of the engine if so what do I do? Thanks for your help

Wednesday, June 10th, 2009 AT 4:10 PM

1 Reply

KHLOW2008

MECHANIC
41,814 POSTS

Hi spdaredevil1063,

Thank you for the donation.

As long as oil level is above the minimum level, there should be no problem of it causing damage to the engine. If any prolem due to oiling in this case, it should be the operational side such as oil pumps, internal colgging etc.

Your problem should not be due to engine mechanical failuer. I would suspect either fuel or ignition fault.

If the engine is still running badly with performance losses, I would suggest checking the ignition coils and fuel delivery.

If problem happens again, test for availability of sparks when it could not start. Pull out a wire and attach a spark plug and ground it to the engine. Crank and watch for sparks. Should be bright blue. Orange or yellow sparks means the ignition coil is weak and would have difficulty starting.

If starting fluid gets the engine started, then it is a fuel related fault.

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Thursday, June 11th, 2009 AT 6:38 PM