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

12,305

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 out of 1 people think this is 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 out of 2 people think this is helpful.
40

Check your MAF mass Air Flow meter

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

300ZX

Looking for a Used 300ZX in your area?

CarGurus has 149 nationwide 300ZX listings starting at $16,995.

ZIP:

Search Nissan 300ZX Questions

UK Questions

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

Nissan 300ZX Experts

#1 Tom Demyan
Tom Demyan
Reputation 430
#2 Jamie Staples
Jamie Staples
Reputation 280
#3 dandyoun
dandyoun
Reputation 230
View All

Related Models For Sale

Used Ford Mustang
533 Great Deals out of 42,736 listings starting at $1,699
Used Toyota Supra
43 listings
Used Chevrolet Corvette
284 Great Deals out of 20,515 listings starting at $3,688
Used Chevrolet Camaro
400 Great Deals out of 40,630 listings starting at $3,500
Used BMW 3 Series
1,512 Great Deals out of 38,828 listings starting at $1,498
Used Nissan 200SX
12 listings
Used Mazda RX-7
52 listings

Used Cars For Sale

1996 Nissan 300ZX For Sale
11 listings starting at $16,995