Another de-cat question

STU T · 20th March 2006, 03:33 PM

I've recently had the second cat taken out of my j spec tt, an think i hit fuel cut the other night. The car lost power for a split second when i was giving it the berries, an its the first time its done it. Its got a speed limit defender, so it was'nt that. Have any of u guys had experiance of this on ur j specs with just the second cat removed ?.

~Rob~ · 20th March 2006, 05:11 PM

You got a boost gauge mate? what boost is it running at?

i dont think that fuel cut comes in till 1.0 bar, not sure if youll hit this with only the 2d cat removed.

STU T · 20th March 2006, 05:51 PM

Alright Rob, yeah i've got a greddy boost gauge, an when i've looked in the past, (before the de-cat) its been up around the 1 bar level. I didn't see what boost i was at the other night, but it was under load for about 5 or 6 seconds. I've got a trust fmic and oil cooler, hks induction, air filter, spitfire plugs and the de-cat's in a superdragger. Would any of these make any differance to what boost i'm getting ?.

madwoody · 20th March 2006, 06:16 PM

i just changed my exhaust and decat my second pipe, i was running at around 10 psi before i'm now running at 16 psi well thats what my gauge says

i also now hit fuel cut i have had a few questions answered on it in another post under (tech) that might help

STU T · 20th March 2006, 06:33 PM

Cheers for that Madwoody, i'll take a look in the tech section.

~Rob~ · 20th March 2006, 08:31 PM

yeah going off what youve said, i assume youre hitting fuel cut. i think it come on when youve held 1bar for about 5 seconds.

im in the process of decatting mine, i bought an FCD from Thor. just wires upto the ecu. looks simple enough, and it raises the fuel cut level, upto 1.4 bar i think.

supra dave · 21st March 2006, 06:54 AM

just to let you know

i think my fcd irradicates it completly, cos its running at about 1.44-1.54 bar. and if a recall i think its a hks from whifbitz.

But best thing to do,... shop about. theres a few traders advatised on the site. give'em a tinkle see what they say.

Davey

~Rob~ · 21st March 2006, 08:51 AM

Quote:

Originally Posted by supra dave

...i think my fcd irradicates it completly, cos its running at about 1.44-1.54 bar. and if a recall i think its a hks from whifbitz...

I think its only the one from Thor that raises the fuel cut level, all the others get rid of it completely.

STU T · 21st March 2006, 01:02 PM

TDI said they could supply an fit an HKS fcd, an i've been happy with the other hks parts fitted, so i might go for this. From what i remember them sayin, it tricks the car into thinking that the level the car needs to get to, to reach fuel cut is never reached. Somthing to do with amps or volts, i think, though someone on here may no more, (or better). Just the second cat taken out seems to have caused fuel cut in a fair few cars on here, i'm glad you guys have had similar experiances, an shared them with me. I did worry it might be somthing more sinister. Cheers.

supra dave · 22nd March 2006, 06:30 AM

no probs dude its what were all here for

20th March 2006, 03:33 PM	#1
STU T Junior Member Jap Spec RZ - Auto (TT) Join Date: Mar 2006 Location: Kent Posts: 27	Another de-cat question I've recently had the second cat taken out of my j spec tt, an think i hit fuel cut the other night. The car lost power for a split second when i was giving it the berries, an its the first time its done it. Its got a speed limit defender, so it was'nt that. Have any of u guys had experiance of this on ur j specs with just the second cat removed ?.

20th March 2006, 05:11 PM	#2
~Rob~ Old Timer None - Don't currently own a MKIV Supra. Join Date: Jan 2005 Location: Bolton, Manchester, UK Posts: 1,476	You got a boost gauge mate? what boost is it running at? i dont think that fuel cut comes in till 1.0 bar, not sure if youll hit this with only the 2d cat removed. __________________ I used to be a Supra owner.. My Old Car

20th March 2006, 08:31 PM	#6
~Rob~ Old Timer None - Don't currently own a MKIV Supra. Join Date: Jan 2005 Location: Bolton, Manchester, UK Posts: 1,476	yeah going off what youve said, i assume youre hitting fuel cut. i think it come on when youve held 1bar for about 5 seconds. im in the process of decatting mine, i bought an FCD from Thor. just wires upto the ecu. looks simple enough, and it raises the fuel cut level, upto 1.4 bar i think. __________________ I used to be a Supra owner.. My Old Car

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20th March 2006, 05:51 PM	#3
STU T Junior Member Jap Spec RZ - Auto (TT) Join Date: Mar 2006 Location: Kent Posts: 27	Alright Rob, yeah i've got a greddy boost gauge, an when i've looked in the past, (before the de-cat) its been up around the 1 bar level. I didn't see what boost i was at the other night, but it was under load for about 5 or 6 seconds. I've got a trust fmic and oil cooler, hks induction, air filter, spitfire plugs and the de-cat's in a superdragger. Would any of these make any differance to what boost i'm getting ?.

20th March 2006, 06:16 PM	#4
madwoody Senior Member Jap Spec RZ - Auto (TT) Join Date: Oct 2004 Location: essex/maldon Posts: 302	i just changed my exhaust and decat my second pipe, i was running at around 10 psi before i'm now running at 16 psi well thats what my gauge says i also now hit fuel cut i have had a few questions answered on it in another post under (tech) that might help

20th March 2006, 06:33 PM	#5
STU T Junior Member Jap Spec RZ - Auto (TT) Join Date: Mar 2006 Location: Kent Posts: 27	Cheers for that Madwoody, i'll take a look in the tech section.

21st March 2006, 06:54 AM	#7
supra dave Jap Junkie Jap Spec RZ-S - Manual Join Date: Jan 2005 Location: Essex, UK Posts: 207	just to let you know i think my fcd irradicates it completly, cos its running at about 1.44-1.54 bar. and if a recall i think its a hks from whifbitz. But best thing to do,... shop about. theres a few traders advatised on the site. give'em a tinkle see what they say. Davey

21st March 2006, 01:02 PM	#9
STU T Junior Member Jap Spec RZ - Auto (TT) Join Date: Mar 2006 Location: Kent Posts: 27	TDI said they could supply an fit an HKS fcd, an i've been happy with the other hks parts fitted, so i might go for this. From what i remember them sayin, it tricks the car into thinking that the level the car needs to get to, to reach fuel cut is never reached. Somthing to do with amps or volts, i think, though someone on here may no more, (or better). Just the second cat taken out seems to have caused fuel cut in a fair few cars on here, i'm glad you guys have had similar experiances, an shared them with me. I did worry it might be somthing more sinister. Cheers.

22nd March 2006, 06:30 AM	#10
supra dave Jap Junkie Jap Spec RZ-S - Manual Join Date: Jan 2005 Location: Essex, UK Posts: 207	no probs dude its what were all here for

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