Rough running, ECU & Wire Harness

Asked by Aug 15, 2012 at 12:38 AM about the 1986 Nissan 300ZX Base

Question type: Maintenance & Repair

My 300ZX began running VERY rough (car shaking), would not go past idle and would then shut down. Pressing the accelerator pedal had no effect. The shop, after testing it advised my that I need a new ECU AND wire harness. (I had a similar problem a few moths ago which was traced to an air mass sensor)
Is this type of problem indicative of a bad ECU and Wire Harness?  Is it worth repairing? (I was quoted $1,600.00 for labor and if I can get the parts they would be about $1,000.00. ) (the car has about 340K miles on it)  Thanks.

3 Answers

13,625

With that many miles I would be cautious putting that kind of money into it. The problem could be an ECU and or wire harness. When vehicles get this old wire connectors and connections start to corrode and give problems. This might be why he is talking wire harness.

1 of 1 people found this helpful.
175

I have a similar problem on my 1990 TT but it only happens after I drive around for about 20 minutes so I was told it could be the coils or the gas pump...your car is probably a different issue since it does it all the time...I am probly binging it to th eguy who rbuilt my engine since he knows these cars very well and will avoid me from spending money on ramdom things....on e advise I can give you is that these car are so old that you dont spent money on them by the book value but becasu eyou love these cars like I do....These cars are timeless classics and when I drive mines around I turn more heads then any of the new cars right now...plus they are super fun to drive when they are running how they should.

2 of 2 people found this helpful.
40

Check your MAF mass Air Flow meter

1 of 1 people found this helpful.

Your Answer

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 125 nationwide 300ZX listings starting at $3,995.

ZIP:

Nissan 300ZX Experts

  • #1
    Tom Demyan
    Reputation
    470
  • #2
    Jamie Staples
    Reputation
    300
  • #3
    dandyoun
    Reputation
    240
View All

Related Models For Sale

Used Ford Mustang
354 Great Deals out of 42,608 listings starting at $1,488
Used Chevrolet Camaro
415 Great Deals out of 31,697 listings starting at $3,495
Used Toyota Supra
56 listings
Used Chevrolet Corvette
118 Great Deals out of 16,191 listings starting at $3,995
Used Nissan Skyline
12 listings
Used BMW 3 Series
1,143 Great Deals out of 34,318 listings starting at $1,209
Used Nissan Maxima
341 Great Deals out of 20,858 listings starting at $1,175
Used Honda Civic
616 Great Deals out of 54,502 listings starting at $1,500
Used BMW M3
34 Great Deals out of 1,883 listings starting at $5,495

Used Cars For Sale

1996 Nissan 300ZX For Sale
10 listings starting at $3,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.