82 280zx Turbo, one momnet ready to race, other moments choks w Turbo kicks

10

Asked by Nov 24, 2015 at 03:09 PM about the 1982 Datsun 280Z Turbo

Question type: Maintenance & Repair

its hit and miss, car runs smooth if accelerated slowly.  if I push it, then its hit and miss.  sometimes u feel when turbo kicks in it backs down as if its shutting down.  other times, no prob, turbo kicks in and its ripping the streets. the other day I drove it for a mile, smooth acceleration, then bad perf if turbo kicked in.  unplugged the throttle sensor, immediately car is ready for race.  few hrs later, back to same issue..very inconsistent

9 Answers

34,605

I wonder if your catalytic converter is getting plugged up or if your turbo bearings are on the way out. Have you tried a tune up? I used to own a 83 Turbo and the shop I went to had a Japanese factory tech tell them - "turbo weird" but I never had a problem like yours.

10

appreciate the reply, the shop could not get much reading from Computer, looks like it requires older equip to do that, but they did a lot of manual voltage chks and determined few faulty parts. we also did plugs, fuel inject cleanup "off the can", fuel filter, air filter. is there a way to bypass certain parts just help rule out? one good mechanic friends belives its a fuel pump issue. if I remember, he pinched line going to regulator and notice higher pressure in line

34,605

Closing off the fuel return line would make the fuel pressure go up but that would be normal. The reason I suspect the exhaust is turbos are sensitive to back pressure. If they can't breath, they can't wind up. Have you checked the waste gate to make sure it is not sticking open?

1 out of 1 people think this is helpful.
10

i informed the shop about ur hint re the waste gate. they are very honest folks w some good knowledge. it sucks im in NY and car in MN. wish there is a way to bypass turbo. i wish i could find someone who can read the car computer. it requires some old equipment to do that. tnx again bro

1 out of 1 people think this is helpful.
10

still no feed back from shop. my previous trusted mechanic "move away" confirmed that waste gate tested fine. He believes that when fuel pump was tested under heavy load it didn't deliver desired pressure. therefore fuel lines not being compensated as they should resulting in turbo acting up..what do u think?

34,605

If you are not getting enough fuel that could explain the problem.

10

NO GO...they claim that they put a heavy load on pump and it did good. Waste gate is ok. whats interesting is when they put car in DIAG mode, car runs perfect. its only when they exit DIAG and sensors are all back in action is when it miss behaves. they are unable to read the computer for someodd reason to determine the faulty sensor. but for God sakes, how many things could possible go wrong?

34,605

All I can say is good luck.

10

tnx a a lot for trying...tc now

Your Answer

Add photo

Related Questions

  • 1975 280z Datsun Electrical Problems? 7 answers

    I have a 75 that will crank up with a jump, run for a little while and then if I sit too long the lights and radio will start to fade out the car will start to choke off like its running out of gas an...

    1975 Datsun 280Z

    -

    Maintenance & Repair

  • What would cause my 1976 Datsun 280Z to just quit and then today started right up? 2 answers

    My wife was driving back from the store and it just quit. It would turn over but acted like it wasn't getting any gas. It has new injectors, fuel filter and fuel pump. I went back to work on it t...

    1976 Datsun 280Z

    -

    Maintenance & Repair

  • I have a 1974 Datsun 260z. The electric fuel pump isn't working. 1 answer

    I have tried replacing it, but that didn't help. Is there an electrical circuit from the ignition that I need to check and how is that accomplished.

    1974 Datsun 260Z

    -

    Maintenance & Repair

  • Turbo trubble? 3 answers

    My probe is acting strange just when the turbo is kicking in a "pling" comes and the car dies if you dont relese the gas pedel and then it wakes upp again and in some rpms/speeds it seems to choke is ...

    1991 Ford Probe GT Turbo

    -

    Maintenance & Repair

  • how do you care for the turbo? 9 answers

    how long must one idle the car before turning off the ignition after driving? Also when does the turbo kick in?

    2000 Audi A4 1.8T

    -

    Maintenance & Repair

280Z

Looking for a Used 280Z in your area?

CarGurus has 8 nationwide 280Z listings and the tools to find you a great deal.

ZIP:

Search Datsun 280Z Questions

Datsun 280Z Experts

#1 Full_of_Regrets
Full_of_Regrets
Reputation 130
#2 tennisshoes
tennisshoes
Reputation 120
#3 Andrew Olsen
Andrew Olsen
Reputation 90
View All

Related Models For Sale

Used Datsun 280ZX
10 listings
Used Porsche 911
140 Great Deals out of 4,325 listings starting at $9,995
Used Chevrolet Camaro
620 Great Deals out of 38,658 listings starting at $2,995
Used Dodge Challenger
411 Great Deals out of 24,722 listings starting at $7,980
Used Chevrolet Corvette
339 Great Deals out of 19,713 listings starting at $3,688
Used Ford Mustang
642 Great Deals out of 36,932 listings starting at $2,800
Used BMW 3 Series
1,610 Great Deals out of 38,816 listings starting at $1,250
Used Land Rover Range Rover
122 Great Deals out of 4,714 listings starting at $4,500
Used Nissan 280ZX
6 listings

Used Cars For Sale