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Was told I should not be using platium spark plugs,by a friend,and that is the cause of the miss,he said. Problem is,that I've used these type of plugs in the past,in other engines with excellent results,and no trouble. So,why all of a sudden,am I having this,after only a few thousand (about 1800 miles). Is my friend,right,or is there another possible reason. Besides the plugs,cap,rotor,and plug wires were changed,at the same time. The car ran good up until recently,and whatever the problem is,is getting worse,almost daily. I'm not a novice,to cars and such,but I'm a novice to Turbo motors,and am wondering is there something unusal about them.
I'm totally mystified. I need HELP,please. I truly love this car,next to my classic Barracudas.

[ May 21, 2002: Message edited by: Spin ]</p>
 

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Just me but I try to stay away from split-fire plugs and platinum (unless O.E. replacement). If the car came with copper plugs than I would use copper. A lot of technicians I have talked to agree that copper plugs actually provide a better burn but manufacturers use platinum to increase service intervals. On some cars it's actually a blessing to not have to change plugs 'till 100,000 miles. It is possible to have a bad plug, I've seen them bad right out of the box. Usually I find most of my misses due to a bad plug under light accelleration after allowing transmission to shift to its highest gear. On a four speed auto I let it shift to fourth then put some load on the engine and I'll see if she misses. It's always possible your problem might not be related to the tune up at all, but it is possible. Maybe you can get someone to sit in the car with it in drive and hold down the gas some putting a load on the engine. If it starts missing carefully grab each spark plug wire boot with insulated wire pullers and pull off one boot at a time to isolate which cylinder is missing. I don't know if chrysler has this problem or not but on a lot of fords the EGR passages clog in the intake so that when the EGR valve opens instead of the exhaust going evenly to all cylinders it only goes to one or two causing a lean misfire on those cylinders. If we disconnect the EGR valve and the miss goes away we know that's the problem. Now this may not be your problem but I just wanted to show you how something not ignition related can feel exactly the same. Hope you get it figured out.

[ April 16, 2002: Message edited by: dmorris1200 ]</p>
 

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I've had some experience with your motor and have a couple of suggestions. 1st check your dist. This is very simple and inexpensive to repair. pull the cap and rotor, then carefuly remove the pickup (the black cover under the rotor, it should just lift up with your fingers)then check the targets and plate (the white plastic part that holds the metal targets). This part fails often enuf to be checked regularly (during tuneups) if this is the problem replace the dist with a turbo dist only (targets are diff in nonturbo engines). if this dont help then try replacing the pickup (a $60 part at autozone)(also for turbo only) (is a dual pickup unit) if the problem still persists then your lookin at a turbo swap and pray that you have the Mitsubishi unit ($600 reman,exchange) and plan on pullin the motor out as this is the only way that I have found to do the job easiest (been there done that,more than once)....good luck
or contact me at [email protected]

by the way, we use platinums in everythin without any problems (Boch) or go back to Champion plugs (Chrys&champion the best way)

[ April 22, 2002: Message edited by: critter ]</p>
 
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