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Ruff Cold Start? (Solved)

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cars4life13

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Discussion starter · #1 ·
Hey guys, after a good amount of searching the forums i wanted to share on how i solved the cold start issue on my 97 Eclipse GSX. I decided to make this thread for anyone having the same issue and wants the right answer on how to fix this issue.

Symptoms: Extremely Ruff Cold Start

My car would crank, crank, crank and Crank. After about 10 mintures of cranking and killing the battery she would slowly Start.




Conclusion: Replace the Coolant Temperature Sensor
AUTOZONE PART # SU4293

LINK

http://www.autozone.com/autozone/pa.../1997-Mitsubishi-Eclipse-GSX-AWD/_/N-j9z0xZ91shd?itemIdentifier=229394_0_18589_



LOCATION: On the Back side of the Thermostat Housing with 1 connector on it.


Replace the Sensor and your Golden :)

My car now starts perfect regardless of the temperature. :)
 
#2 ·
I have replaced both coolant temp sensors and my thermostat and I still have a rough cold start as you described, but mine is only like that in the summer, in the winter it runs perfectly. Any ideas on that?
 
#3 ·
That's fine and well, but you could have checked the temp sensor with an ohm meter rather than just guessing it was the problem.

Djinc - First thing to check is basic health of the engine. Fuel pressure, compression, boost leaks, sensor connections, etc. If you don't have a check engine light and the other stuff checks out then you can check other things. I however NEVER recomend throwing parts at a car.
 
#5 ·
Sean485 said:
First thing to check is basic health of the engine. Fuel pressure, compression, boost leaks, sensor connections, etc. If you don't have a check engine light and the other stuff checks out then you can check other things. I however NEVER recomend throwing parts at a car.
Click to expand...
I will do a compression test on Saturday, my sensor connections are good and no MILs are on. Ill see if I can do a smoke test for leaks, I know I have oil leaks and the oil pressure is low but I can't afford to fix these at the moment.
 
#8 ·
Okay so I just finished the compression test and I got:
#1 - 120
#2 - 105
#3 - 115
#4 - 105

I also noticed a crack in my valve cover while doing this, do you guys think it would be okay to clean it up and seal it with jb weld or am I better off just buying a new one?
 
#9 ·
If you can get the valve cover very, very clean and let the jb weld set it will seal fine.

As for the compression that is VERY low for a 2g, borderline surprised it starts TBH. I would check the mechanical cam/crank timing to be sure it hasn't jumped time.
 
#13 ·
Well I did the test twice because I forgot to push the gas first time so I am fairly sure I did it right and long enough. However I forgot to mention, when I did cyl 1 my girlfriend said little white chips flew out of cyl 2, I am sure this is a bad thing but what does it mean? Also how much compression should a stock 2g have?
 
#14 ·
Compression should be 140-160 or so in a really good engine, they will run with much lower than that but it gives you an idea of the overall condition. White chips could be anything, (especially to a girl) it might have been white carbon or just filth that was laying outside of your spark plug holes.
 
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djinc
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