2002 Diamante 3.5 Diamante no start - Mitsubishi-Forums.com
 
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post #1 of 7 (permalink) Old 04-17-2017, 03:05 PM Thread Starter
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2002 Diamante 3.5 Diamante no start

I just got a 2002 Diamante for very cheap. It came with some new stuff but a lot of issues. The original owner took it to Midas for a tune up as it was running "extremely rough". They changed plugs and wired and told him that the spark plug wells were very oily....

Against they're suggestions, the owner didn't replace the spark plug well grommets and drove it away. It slowly returned to not running very well again and then quit starting all together. This is where I come in. I purchased it off him cuz he was sick of the car.

The valve cover gaskets were shot and the distributor too ia very oily from what I can see. When I got it, I checked for spark and got it from the front three plugs. I pulled the line that feeds the fuel rail and got pressurized gas.

My 1st plan of action is to do gaskets and plug well grommets. I'll clean off the plugs before reinstalling.

My questions are, if I do this and still get a no start, could the distributor be shot even though I'm getting spark at the front 3 cyl.? This motor has an internal cam sensor in the distributor, could that have been killed with oil?

Car came with a new battery, new alternator, and a new crankshaft sensor in the box. Apparently, he was trying anything to keep this running except spend $30 on gaskets, lol!

Last edited by chain rattle; 04-17-2017 at 04:29 PM.
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post #2 of 7 (permalink) Old 04-17-2017, 04:35 PM
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there is lots of information on the 92-05 diamante in the pinned section of this forum
<br />
common fixes<br />
replace the dissy cap and rotor . .not sure if it easier with inlet manifold off<br />
when fitting rear plugs use iridiums ....... to reach them it is easier with inlet manifold off <br />
the valve rocker covers leak often <br />
idle control valve can be cleaned or replaced <br />
timing belt ,water pump , cam seals are changed at the same time <br />
coil and exciter is another thing to check

Last edited by chain rattle; 04-19-2017 at 08:40 PM.
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post #3 of 7 (permalink) Old 04-17-2017, 05:09 PM Thread Starter
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Yes, thanks. I did see the links already. Planning on using them.

Took the cap off and seems ok. Not burnt out looking at all. Maybe it's new as they did replace all the plugs?

Oil is all sludged over the top of tbe distributor.

Back valve cover is all kinds of leaking, haha.

Seems to almost start every couple of cranks, hope I clean up the oil mess and it fires up, the front three plugs have oil down the threads. I bet the tears are worst. Is this usually the case since the rear plugs are under the manifold and fire wall collecting more heat?
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post #4 of 7 (permalink) Old 04-18-2017, 12:29 AM
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Rear plugs always get most heat because airflow there is less than front.

Too much heat is always bad - leaks in rear first - gaskets lose flexibility through heat.
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post #5 of 7 (permalink) Old 04-18-2017, 09:29 PM Thread Starter
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Pulled the manifold off. The rear plugs seem fine. Even less oil on them than the fronts. Still gonna change all the gaskets. This can't be my no start cause.

Don't have much time this week to troubleshoot. So I'm gonna do the gaskets now that everything is apart then go from there.

Just curious, do these distributors only key in one way? Can I pull the distributor and install the replacement exactly the way the original came out?

So much sludge is on the distributor that I can't even see the bolts that hold it on or see the top shape of it. Just a slant shape of caked oil to the cap
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post #6 of 7 (permalink) Old 04-19-2017, 08:44 PM
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Degrease the dissy area

Put crank pully to tdc
compression stroke on numb one
check cam and crank timing marks are correct
then remove dissy <br />
<br />
<br />
Possibe the dissy seal is leaking <br />
Worth giving the dissy a clean <br />
<br />

Last edited by chain rattle; 04-19-2017 at 08:48 PM.
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post #7 of 7 (permalink) Old Yesterday, 02:06 PM Thread Starter
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Would simply cleaning it bring it back to life? I was under the impression that the caked on oil would basically fry it to death. Ive never worked on one of thise type of distributors
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