Very poor gas mileage, weird turbo engagement.?

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Very poor gas mileage, weird turbo engagement.?

Postby Rallly » Tue Aug 18, 2015 11:00 pm

Hey guys, I just bought a stock 91 AllTrac and turbo doesnt seem to engage properly, not hearing any noises as stock boost gauge rises and as it rises, car seems to chug like turbo is turning on and off or something? Also, I'm only getting 325kms city, with a full tank of 91octane. Plugs, cap, rotor and wires were just done but gas mileage still sucks..Help please:/
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Re: Very poor gas mileage, weird turbo engagement.?

Postby alltracman78 » Wed Aug 19, 2015 1:12 am

Did you use Denso or NGK parts?
If not you should have.

Sounds like you're misfiring. Try running a can or two of seafoam through the intake.
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Re: Very poor gas mileage, weird turbo engagement.?

Postby Rallly » Wed Aug 19, 2015 1:41 am

alltracman78 wrote:Did you use Denso or NGK parts?
If not you should have.

Sounds like you're misfiring. Try running a can or two of seafoam through the intake.



Is that going to harm my cats? Also where do I inject the stuff into the intake?
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Re: Very poor gas mileage, weird turbo engagement.?

Postby FC Zach » Wed Aug 19, 2015 4:16 am

Some people spray, this what I did on my 6th gen but that car didn't have a AFM. I just poured the stuff into a spray bottle and misted it directly through the throttle body. Some pull it through a vacuum source, I never liked the idea of doing this but the instructions are on the container. . You can also simply pour into the gas tank.

When I did my old Celica (6th gen) years ago I misted some of the contents through the TB as mentioned and poured the rest in the tank. When I left the neighborhood the car literally smoked like a freight train! So much crap had loosened from the motor and was burning off. I'd definitely inspect and/or replace the plugs afterwards.

As for the cat, I'm not sure. . . mine wasn't destroyed and overall mileage did improve.

Edit, found info on the site.http://seafoamsales.com/sea-foam-motor-treatment/how-to-use-sea-foam-motor-treatment-4-cycle-engines/
1992 Toyota Celica AllTrac
1987 Mazda RX7 Sport
1979 Yamaha G1A, rotary powered with Sachs KM24
1976 Hercules W2000, oil injected
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1992 Toyota Celica


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