what could be the problem to my 1991 mr2 turbo?

Asked by Sep 25, 2012 at 04:03 AM about the 1991 Toyota MR2 Turbo T-bar

Question type: Maintenance & Repair

i cant redline anymore on my mr2 sw20 turbo...sometime my turbo would spool n there will be no power to my engine..feel as if it is just sucking in air n its not going into the engine

1 Answer

475

Black smoke while doing this or not? If yes, probably a leak between the intake and the throttlebody. Check all vacuum lines. The way you describe it, it seem to be a clogged open wastegate (the are internal inside the turbo). Could be aslo a stuck open blow-off valve if it's cheap or a bad MAF (Manifold Air Flow) MAF are getting stuck sometimes. If you're engine Speed cut when the boost comes on it's probably because you have a bad/faulty boost pressure sensor. The 3SGTE is set to hit a fuel cut at around 12psi. So if you installed a manual boost controler without a fuel cut defencer to trick the fuel management system, it will cause your engine to kinda Stop to protect it and you'll regain power when safe boost pressure is reached. You'll get a check engine for that, Code 35 I beleive if I remember.

1 of 1 people found this helpful.

Your Answer

Toyota MR2 Experts

  • #1
    Nick Eidemiller
    Reputation
    200
  • #2
    Francis Lapointe
    Reputation
    140
  • #3
    carGrrl
    Reputation
    130
View All

Related Models For Sale

Used Toyota Supra
64 listings
Used Toyota Celica
4 Great Deals out of 317 listings starting at $1,900
Used Mazda MX-5 Miata
81 Great Deals out of 4,349 listings starting at $2,900
Used Mazda RX-7
67 listings
Used BMW M3
46 Great Deals out of 1,758 listings starting at $5,995
Used Nissan 240SX
12 listings
Used BMW 3 Series
1,143 Great Deals out of 33,037 listings starting at $1,000
Used Ford Mustang
705 Great Deals out of 38,301 listings starting at $895
Used Nissan 300ZX
137 listings starting at $3,995
Used Honda Civic
825 Great Deals out of 72,772 listings starting at $1,000
Used Chevrolet Corvette
276 Great Deals out of 20,688 listings starting at $2,990

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.