1990 Mitsubishi Eclipse GST

Asked by Aug 18, 2012 at 04:12 PM about the 1990 Mitsubishi Eclipse GS Turbo

Question type: Maintenance & Repair

I have the above car. It has only 120K miles on it. But it seems to have an intermittent idle problem which seems mainly in hot weather. It also has a problem on hard acceleration. It feels like it is running out of air or gas. But is fine on the freeway at even 80 mph. The air filter is relatively new. The fuel filter is about 5 years old. I would like some advice on both.   Also do I need to upgrade the turbo to widen the powerband? The power seems to drop off at around 5500 rpm which makes for sort of a limited powerband.  I am not looking for a huge gain in power...just improve it a little. Any advice is appreciated!

6 Answers


5 years for a fuel filter is really old.it should be changed every year or 20000 kms/12000miles and your air filter as well.clogged filters will affect fuel ecomomy and performance. bad fuel filter can make it run like crap especially when accelerating.


Your issue really depends on how the problem happens... If its under full boost that it feels like it "cuts" than there are a few things you can try.. I need more info!


Sounds like a huge vacuum leak. Explains both problems. Check your vacuum/boost rubber lines.

Can u swap a 92 gs 2.0L non turbo flywheel with a 1990 gst flywheel and transaxle?


the 2.0 DOHC flywheel/driveplate is strictly a 6 bolt the 1.8 SOHC has a 5 bolt flywheel/driveplate. i needed a new tranny for my 92 gs 2.0 so i went to the junk and only found 1 auto tranny but was on a 91 gs 1.8. so i busted my ass taking that tranny off, payed for it. first thing i noticed when i was going to put the new tranny on mine is that the 1.8l has a 5 bolt flywheel/driveplate. my crankshaft bushing was a 6 bolt and would not line up with the 5 bolt flywheel. i put the tranny on but had to use the old flywheel/driveplate and the adapter plates on my old tranny. So pretty much the the SOHC engine is a 5 bolt and the DOHC engine is a 6 bolt strictly.. and dont forget to put lock tight on the threads before screwing the flywheel back in! if not your transmission bellhousing will crack. Mine cracked all the way down to the last bellhousing bolt that screws into the block and broke that piece off too. so my tranny is only holding up by 4 bolts.


make sure your idle air control valve (IACV) is good that will cause spikes and drops in idle but run just fine when not at idle

Your Answer

Add photo

Related Questions


Looking for a Used Eclipse in your area?

CarGurus has 1,317 nationwide Eclipse listings starting at $1,998.


Search Mitsubishi Eclipse Questions

Mitsubishi Eclipse Experts

#1 dandyoun
Reputation 1,570
#2 Daniel Foster
Daniel Foster
Reputation 710
#3 Tom Demyan
Tom Demyan
Reputation 380
View All

Related Models For Sale

Used Ford Mustang
302 Great Deals out of 45,096 listings starting at $2,000
Used Honda Civic
511 Great Deals out of 80,666 listings starting at $558
Used Chevrolet Camaro
158 Great Deals out of 35,580 listings starting at $1,995
Used Mitsubishi 3000GT
87 listings starting at $3,499
Used Toyota Celica
3 Great Deals out of 335 listings starting at $1,995
Used BMW 3 Series
1,131 Great Deals out of 35,653 listings starting at $900
Used Honda Accord
685 Great Deals out of 81,559 listings starting at $1,200

Used Cars For Sale

2012 Mitsubishi Eclipse For Sale
69 listings starting at $4,950
2011 Mitsubishi Eclipse For Sale
48 listings starting at $4,990
2010 Mitsubishi Eclipse For Sale
7 listings starting at $8,774
2009 Mitsubishi Eclipse For Sale
4 Great Deals out of 142 listings starting at $3,500
2008 Mitsubishi Eclipse For Sale
199 listings starting at $3,395