Join Date: Dec 2009
Location: cincinnati ohio
Drives: KIA sportage 98 5-speed manual
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98 Sportage Loss Of Power / Acceleration
98 SPORTAGE LOSS OF POWER / ACCELERATION
I know this may be discussed here before but none had a single solution to this.
I bought the car used few months ago with 100,000 miles.
No serious problems when i get it.
1000 miles later steering pump belt broke and mechanic suggest to change all belts including timing belt. We did that and everything was fine for a while other than some leak of steering fluid that fixed with a special steering fluid.
A couple of months later i had misfiring problems, rough running engine and decide to start with the obvious and replaced all spark plugs. I found oil in a couple of plugs holes probably of a leaking head gasket.
(I drove the car for many miles with the problem since i didn't have any time to fix it. Also i saw that under body catalytic converter was glowing orange after a few miles trip , i guess that normal with unburnt gas)
With new plugs (i did not adjust the gap to be honest) problem solved 95% and still had some engine hesitation at low (below 2300)rpm but no codes..
One day i was driving back to home and i find out i have loss of power.
RPM can't go over 4500 in first gear, 4000+ in second, 3000 in 3rd or 4th etc.
On Neutral it rev up good to 6500rpm. Up hill is a nightmare, downhill is going good (lol). I had a code which is p0422 for low converter efficiency...
Engine acts like to trail a locomotive and it sound like it suffer when i try to accelerate more than 3000rpm. Also consumes a lot of fuel (30% more i say)
Solutions i found here are:
1. Hood insulation blocking ram air input issue(i did cut it , Wasn't that )
2. Timing belt (I replaced it few months ago , it may jumped a teeth ? Can i check it easy without removing half of the engine?)
3. Catalytic converter clogged (which one or both? )
4. Any of the air intake sensors (MAF IAT etc but have no codes for any of them)
Any help is appreciated since i don;t want to replace any valuable parts with no reason.