Starting Problems

25

Asked by Nov 09, 2014 at 12:57 PM about the 1991 Mitsubishi 3000GT 2 Dr SL Hatchback

Question type: Maintenance & Repair

I have a 91' 3000 GT SL with 51,800 miles.  Have had problems for a long time with engine intermittently missing.....drives ok for a while then takes a nose dive and looses power and wants to stall....kinda feels like the engine is running on less than 6 cylinders (as if someone pulled a couple plug wires while running).....if I play with throttle, the engine will sometimes come back....other times not.  The tach wildly jumps between 0 and 7000 RPM while it misfires.  I replaced the PTU and all three coils with NOS parts as I was getting error codes of 52 and 53....trhat made sense to me because the PTU feeds the tach.  Ran ok for a while than did the same thing again.  Took the coils and PTU out again and bench tested to be sure they were OK....then put back in the car.  Each time I did this, I took the neg battery cable off to be sure I didn't short anything.  The second replacement I did I noticed a "click" when I put the neg cable back on....sounded like a relay switching or a fuse link or fuse blowing.  This time the engine turned over but wouldn't start.  I checked all the fuses under the hood and dash and all fuses look good.  I'm not a total gear head but I can follow directions and can figure things out.  Can anyone give me some help with this???

5 Answers

10,340

thats a toughie, i would look for vacuum leaks to start with.

104,085

Have you checked your ignition relay? Mounted under carpet passenger side of center console. Have you checked for fuel pressure?

1 out of 1 people think this is helpful.
104,085

Also check your negative battery connections on the frame and motor. These cars are known to do all sorts of weird things when grounds are not perfect.

1 out of 1 people think this is helpful.
25

I did check grounds on transmission and the two on the firewall (first one to the ground side of battery and second one from firewall to motor) they were OK. When I heard the click is sounded like it came from the top or rear of the engine and the more I think about it I think it sounded like a relay or spark jump. I will pull the ignition relay.....is there a bench test to check for defects???

2 out of 2 people think this is helpful.
10,340

yes, go to you tube and type in "how to test automotive relays". also, ericthecarguy.com has a vid or 2 on this subject.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

3000GT

Looking for a Used 3000GT in your area?

CarGurus has 88 nationwide 3000GT listings starting at $3,000.

ZIP:

Search Mitsubishi 3000GT Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mitsubishi 3000GT Experts

#1 dandyoun
dandyoun
Reputation 2,440
#2 Daniel Foster
Daniel Foster
Reputation 850
#3 T_S_T
T_S_T
Reputation 260
View All

Related Models For Sale

Used Mitsubishi Eclipse
57 Great Deals out of 1,494 listings starting at $2,000
Used Mitsubishi Lancer Evolution
23 Great Deals out of 672 listings starting at $13,977
Used Ford Mustang
580 Great Deals out of 41,215 listings starting at $1,699
Used Toyota Supra
38 listings
Used Nissan 300ZX
144 listings
Used Chevrolet Camaro
475 Great Deals out of 39,917 listings starting at $3,499
Used Chevrolet Corvette
292 Great Deals out of 20,417 listings starting at $3,688
Used Dodge Stealth
42 listings
Used Nissan 240SX
17 listings
Used Mazda RX-7
49 listings
Used Acura NSX
231 listings starting at $32,995