Fuel cut?

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Fuel cut?

Postby chevyok06 » Sun Nov 24, 2013 2:53 am

So I think i'm experiencing fuel cut? But i'm alos not so sure. I have watched a few videos and it seems like a very gentle thing for everyone else when it happens. When mine decides to do it , every now and again it seems to be very violent. I have a 3rd gen 3sgte with a 3rd gen ecu and a 2 bar map. I am running 11-12psi and I get decent pulls sometimes on up to 7k rpms if i'm at like 1/2 to 3/4 throttle. But when I put it o the floor and I hit full boost its more like 5500 when it kills. So a few questions are, Can I run a fcd I have been told no but I read that mr2 guys are running the hks fcd with there 3rd gens and map sensors. Also is it a violent surge when it happens or am I experiencing something else? Where should the car redline at? I will try to get some videos of it but that may take a while. THANKS



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Re: Fuel cut?

Postby quieter » Sun Nov 24, 2013 3:11 pm

do you have an aftermarket fuel pump? i checked your other posts and it says you got an st165. do not get an FCD if you got a 3rd gen. fuel cut is at 17.4 psi and at that pressure is pretty much the max you will get out of the turbo so theres no point of going for more. if you want to push it more then get a standalone to be safe. do you have a wideband to monitor your AFR? do you have an aftermarket exhaust?
1990 toyota ST185 with st205 goodies (scrapped)
2011 BMW 535xi M pack (daily)

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Re: Fuel cut?

Postby chevyok06 » Sun Nov 24, 2013 5:23 pm

No afr I have a third Gen engine in an st165. 3 inch exhaust all the way back. I was told the map I have. A 2nd Gen 2 bar is what's holding me back. Not sure about the fuel pump.
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Re: Fuel cut?

Postby quieter » Sun Nov 24, 2013 9:56 pm

im not sure what you mean by 2 bar but its really important that you replace your fuel pump because of the 3rd gen ( 17 psi+ 540cc injectors) st165 pump just wont do it
1990 toyota ST185 with st205 goodies (scrapped)
2011 BMW 535xi M pack (daily)

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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 1:51 am

Is the fuel pump on tank? Or inline? And 2 bar is the map sensor rated for 2 bars of pressure.
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Re: Fuel cut?

Postby quieter » Mon Nov 25, 2013 3:24 am

in the fuel tank. i know that in st185 models you need to drop the tank. i dont know about st165
1990 toyota ST185 with st205 goodies (scrapped)
2011 BMW 535xi M pack (daily)

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Re: Fuel cut?

Postby phattyduck » Mon Nov 25, 2013 5:30 pm

If you are running a 3rd gen ECU, you need the 3rd gen 2.5 bar MAP sensor. No ifs, ands or buts. It is required to get fueling correct. Check the part number on your MAP sensor and post it up to verify.

-Charlie
'89 Camry LE Alltrac 3S-GTE - SV25/ST205 hybrid
'99 4Runner SR5 4WD 5VZ-FE
Previous: '88 Camry LE Alltrac 3S-GE BEAMS, '90 Camry 3S-GTE, '90 Camry DX
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 5:34 pm

88420-10020
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Re: Fuel cut?

Postby phattyduck » Mon Nov 25, 2013 5:46 pm

chevyok06 wrote:88420-10020
I can't find that part number anywhere... The ST205 MAP sensor is 89420-20310. MR2 3rd gen motor is 89420-17050...

-Charlie
'89 Camry LE Alltrac 3S-GTE - SV25/ST205 hybrid
'99 4Runner SR5 4WD 5VZ-FE
Previous: '88 Camry LE Alltrac 3S-GE BEAMS, '90 Camry 3S-GTE, '90 Camry DX
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 5:50 pm

Yup here's mine. And the mr2 version I was under the impression it was a3 bar
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uploadfromtaptalk1385405378669.jpg
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 6:10 pm

Sorry it was 89420-10020
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Re: Fuel cut?

Postby phattyduck » Mon Nov 25, 2013 6:13 pm

chevyok06 wrote:Sorry it was 89420-10020
See the responses regarding this on the other thread... :)

-Charlie
'89 Camry LE Alltrac 3S-GTE - SV25/ST205 hybrid
'99 4Runner SR5 4WD 5VZ-FE
Previous: '88 Camry LE Alltrac 3S-GE BEAMS, '90 Camry 3S-GTE, '90 Camry DX
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 6:23 pm

I did and they recommended 89420-17050 that on and every thing I read says its a 3 bar map. ? Sorry just really confused and want to get it right the first time I buy this 300$ Part.
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 6:43 pm

This is all the writing I can find.
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uploadfromtaptalk1385408620064.jpg
uploadfromtaptalk1385408598946.jpg
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Re: Fuel cut?

Postby chevyok06 » Mon Nov 25, 2013 6:53 pm

Woops wrong thread
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