6mge engine problems

2184 Views 18 Replies 9 Participants Last post by ren0, Nov 16, 2003

ren0

Discussion Starter · Nov 7, 2003

i'm not quite sure if this is a 6mge specific problem. but anyway, when we first went to test drive my car it sort of bogged down and wouldn't rise above 1000-1500rpm in any gear. my dad suspected water in the gas tank, so we ran some heet through it. after that it ran fine. its still jerky when i accelerate though (like there is more water). but we've ran at least three bottles of heet in it and i use 91 octane (its the highest i can find). still has the problem with acceleration.

lets get to my question. well today when i started it up and drove off, it did the same as when we test drove it. it bogged at 1500rpm and then when it rose above that it took forever to get to 3000rpm. my question is, what could be causing this? do you think that i may have a leak in my tank, that lets water in (it has been snowing.. so is it possible melted snow could have gotten in?) ?

what do you think about this?

i have one more question that is totally unrelated. but what is the difference between a p-type and an l-type? is there any way i can tell what my 85 mkII is?

1 - 19 of 19 Posts

rumptis

· #2 · Nov 8, 2003

The best way to tell if you have a L or P type is look at the fender Flares, if you have the bigger ones then you have a P-Type look at my website both of the supras on there are P-Type.

I really don't know what to say about your other probably, I find it hard to beleive that you have snow melting and getting the tank unless there is a big hole or you don't have a gas cap on the car and have the cover open. If running heet through it seems to help it sounds like water is getting in some how. I would just take the tank out and have a look at it. they come out pretty easy. Also changing the Fuel filter would be good thing to do.

I hope this helps

Jason

GOT MY 6M ORDERED TODAY!!!! WOOHOO!!!!

ren0

Discussion Starter · #3 · Nov 8, 2003

there is an error when i visit your site. (error 401: unauthorized access)

i was thinking that it was the fuel filter, but i barely have enough money for gas these days.. so i was just going to see if anyone had any other opinions, or if everyone thinks its the fuel filter. (if so. i'll buy a new one..)

Flyin' Hawaiian

· #4 · Nov 8, 2003

it could be dirty injectors too. Also, if you have water going thru the system, there may be water stuck in the line, most likely at the filter, and causing low pressure at the injectors.
I'd suggest running a can of bg injector cleaner (or some other top-quality brand efi cleaner, not the cheap stuff at the local parts stores), Toyota dealerships normally carry the BG brand. It's expensive, but really does wonders for dirty injectors! And when you have enough money, get a new fuel filter, if you had water thru the system, chances are you also have had dirt with it!
Good luck!

Dave A.

· #5 · Nov 8, 2003

Try draining some gas out of the tank into a large glass jar by removing the drain plug on the tank and see if any water appears at the bottom of the jar. Water is heavier than gas and sinks to the bottom of the tank. You need to get the gas tank back in shape first and then flush the fuel lines and install a new fuel filter.

ren0

Discussion Starter · #6 · Nov 9, 2003

alright, we looked at the fuel filter and its brand new. it looks clean too, so we haven't replaced that. we ran some fuel injector cleaner in it. it still has the same problems. it almost chugs. it chugs like its not getting enough gas. it does this till around 3000rpm and then it goes fine. it does it in every gear, till 3000rpm.

also.. we just refilled the tank so i am not going to drain any gas just yet, for fear of draining a lot. heh.

CDarthvader

· #7 · Nov 10, 2003

rumptis said:
The best way to tell if you have a L or P type is look at the fender Flares, if you have the bigger ones then you have a P-Type look at my website both of the supras on there are P-Type.

Jason

GOT MY 6M ORDERED TODAY!!!! WOOHOO!!!!

What if i have big flares in the back and no flares in the front :?:

Tommy

· #8 · Nov 10, 2003

It sounds like you may have an air leak between the AFM and the TB. Check the air intake plumbing for cracks, holes etc. Unmetered air results in a lean condition every time, and will give you the chugging, lack of RPM and throttle response.
Jamie

ren0

Discussion Starter · #9 · Nov 10, 2003

alright, well now the car won't start at all. at eleven on saturday it was running really well. but sunday morning, i went out to start it and it wouldn't. so i tried to pop the clutch (don't ask me why, the battery is fine.) and it worked, it started it, but it still has the same problems. so we're thinking there's something caught in the fuel filter, or something is caught and maybe messed up somewhere. and it needed some movement, or a jerk to get it gone. but its back to the same.

so, tomorrow or today we're going to replace the filter, and then blow out the fuel lines and check the tank for debris.

ps. my car is a ptype. it looks like that silver one on rumptis' site.

Dork MK2

· #10 · Nov 10, 2003

clogged Cat. Converter. what do you bet? if you can get it started, drive it around for a while, then look under the car and see if the cat is glowing red. :wink:

ren0

Discussion Starter · #11 · Nov 11, 2003

well, it shouldn't be clogged since i got a new one installed when i bought the car (damn thing wouldn't pass emissions).

we got a fuel filter, but its too dark so we're waiting till tomorrow to put it on. after that, i'll see if its fixed and then i'll check the cat. (i doubt its that though.)

i really think it is fuel related.

Flyin' Hawaiian

· #12 · Nov 11, 2003

have you checked the computer codes? That may shed some light on where to start looking. If no codes have been set, reset the ecu and see if it runs better....

Jags_81

· #13 · Nov 11, 2003

right timing?

for shits and giggles try taking off your timing cover and check your cam timing. i had a similar problem when i bought my 86 because the previous owner didn't torque the crankshaft pulley down tight enough (a mountain moving 151 ft-lbs) which allowed the half moon key on the crankshaft sprocket to shear and caused a retarding problem with the timing. hopefully that helps if not then back to the drawing board.

ren0

Discussion Starter · #14 · Nov 11, 2003

Flyin' Hawaiian said:
have you checked the computer codes? That may shed some light on where to start looking. If no codes have been set, reset the ecu and see if it runs better....

the computer codes? yeah, i'm really a newbie. so i don't know what the ecu is or any computer codes.

Jags_81 said:
for shits and giggles try taking off your timing cover and check your cam timing. i had a similar problem when i bought my 86 because the previous owner didn't torque the crankshaft pulley down tight enough (a mountain moving 151 ft-lbs) which allowed the half moon key on the crankshaft sprocket to shear and caused a retarding problem with the timing. hopefully that helps if not then back to the drawing board.

alright, i'll look at the timing.

85_6mge

· #15 · Nov 11, 2003

computor codes - from your ecu - time to become familiar with the TSRM. It will give you practice in using the "SEARCH" button. HTH

ren0

Discussion Starter · #16 · Nov 11, 2003

85_6mge said:
computor codes - from your ecu - time to become familiar with the TSRM. It will give you practice in using the "SEARCH" button. HTH

heh, it made me mad about this. but my car didn't come with a service manual. soo.. i'll search.

85_6mge

· #17 · Nov 12, 2003

If you haven't found this yet...This is for a 86 but will be good for your 85

http://www.cygnusx1.net.supra/library/TSRM_MKII/in/IN_001.html

BTW the TSRM is available from Jeff Watson. 1-800-327-2087 About $80.00 or Ebay but they are year specific..

ren0

Discussion Starter · #18 · Nov 12, 2003

well, we've installed the fuel filter with no luck. so i think its narrowed down to the fuel pump. tomorrow when there is some light i'll do a test, to see if it is working. i'm pretty sure it isn't though.. as the only way we could get it to turn over was by putting gas in the throttle body. also, there is no fuel pressure. so, i'm hoping it is just the fuel pump.

ren0

Discussion Starter · #19 · Nov 16, 2003

yeah. i just thought i would update with how it went.. and if there are still problems.

it failed that test, so we had predicted it was the fuel pump. since we didn't want to deal with the gas and all that coming out.. we sent it to a friend. and he replaced it.

now the thing screams like a banshee!

1 - 19 of 19 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.