1800 rpm cut off

tak2099 · 05-07-2010, 04:49 PM

What causes the car to cut out at 1800 rpms? When idling i can rev it past 1800, but while driving, it will not go past 1800. Im assuming its some kind of fuel cut off. But my question is what are all of the different elements that could cause this? Also the MIL is not on.

TripleC · 05-07-2010, 05:08 PM

Boost leak. Dose the engine rev or NO?
Check your battery!
Check your Spark Plugs

tak2099 · 05-07-2010, 05:18 PM

Battery?!?
It does rev, it actually idles very smooth, and will run just amazing until 1800 rpms.
And the spark plugs are brand new....along with everything else.
Could timing cause this? because i havent times it since i put the head back on.

TripleC · 05-07-2010, 05:32 PM

OHH hell yeah if oyu havnt timed it this is probably your problem. The battery connections can cause all kinds off issues as well.I just encountered this problem so i am fresh off shitty connection problems causeing detonation and power issues

tak2099 · 05-07-2010, 06:11 PM

well, turns out its my tps.... finally got it to give me a code...which was 41. so now i have to figure out how the hell to deal with this nissan tps.

kamikazemkiii · 05-08-2010, 01:15 AM

did you hook up the coils and wires the correct way?

tak2099 · 05-08-2010, 02:34 AM

Yes the coils and wires are hooked up correctly. Ok, so I wired the stock tps back up, and modified my 80mm TB to use the stock one. Now it does go past 1800 rpms, BUT it still cuts out, but now its random. At WOT it goes just fine, but under normal driving it will randomly cut out. Do you guys think maybe my tps isnt adjusted right? Or maybe if my timing was off it could cause this? Or are both of those not things that would cause a random shut off?

kamikazemkiii · 05-08-2010, 03:54 AM

could be the tps

Semper_Fi · 05-08-2010, 06:18 AM

Quote:

Originally Posted by tak2099

Yes the coils and wires are hooked up correctly. Ok, so I wired the stock tps back up, and modified my 80mm TB to use the stock one. Now it does go past 1800 rpms, BUT it still cuts out, but now its random. At WOT it goes just fine, but under normal driving it will randomly cut out. Do you guys think maybe my tps isnt adjusted right? Or maybe if my timing was off it could cause this? Or are both of those not things that would cause a random shut off?

I would start with the timing.. Take the 7mgte cover off, and check it with the timing gun... the numbers, letters should be right stationary when you check it... hope i could help...

carlos

supraflymkiii · 05-08-2010, 09:06 PM

He already said it was his TPS which is what I was going to say. Readjust it and it should be good to go. This was the first thing I ever had a problem with on my first Supra, so I know first hand what he's talking about.

05-07-2010, 04:49 PM	#1
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	1800 rpm cut off What causes the car to cut out at 1800 rpms? When idling i can rev it past 1800, but while driving, it will not go past 1800. Im assuming its some kind of fuel cut off. But my question is what are all of the different elements that could cause this? Also the MIL is not on. __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

05-07-2010, 05:08 PM	#2
TripleC 3" Exhaust Join Date: Nov 2009 Location: Fort Collins, CO Posts: 103	Boost leak. Dose the engine rev or NO? Check your battery! Check your Spark Plugs __________________ 1JZGTE ,R154, Hallman Boost Controller, HKS bov, HKS Mushroom top Air Filter, HKS Front Mount Intercooler, Greedy Turbo Timer, PLX300 AFC, Custom Divorced Y-pipe, Custom Intercooler Pipeing, RS-R Concept Exhaust, Optima Red Top Battery, Strut bar Brembo Rotors, A1 Traction arms, Megan Coilovers, Stern ST 2 wheels rear 265x30 r19 - front 245x35 r19, New Front Lip, 18 x 8 and 18 x 9 MRR HR2 with whatever for Drift treads 2 additional C12A turbo's(Extra)

05-07-2010, 05:18 PM	#3
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	Battery?!? It does rev, it actually idles very smooth, and will run just amazing until 1800 rpms. And the spark plugs are brand new....along with everything else. Could timing cause this? because i havent times it since i put the head back on. __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

05-07-2010, 05:32 PM	#4
TripleC 3" Exhaust Join Date: Nov 2009 Location: Fort Collins, CO Posts: 103	OHH hell yeah if oyu havnt timed it this is probably your problem. The battery connections can cause all kinds off issues as well.I just encountered this problem so i am fresh off shitty connection problems causeing detonation and power issues __________________ 1JZGTE ,R154, Hallman Boost Controller, HKS bov, HKS Mushroom top Air Filter, HKS Front Mount Intercooler, Greedy Turbo Timer, PLX300 AFC, Custom Divorced Y-pipe, Custom Intercooler Pipeing, RS-R Concept Exhaust, Optima Red Top Battery, Strut bar Brembo Rotors, A1 Traction arms, Megan Coilovers, Stern ST 2 wheels rear 265x30 r19 - front 245x35 r19, New Front Lip, 18 x 8 and 18 x 9 MRR HR2 with whatever for Drift treads 2 additional C12A turbo's(Extra)

05-07-2010, 06:11 PM	#5
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	well, turns out its my tps.... finally got it to give me a code...which was 41. so now i have to figure out how the hell to deal with this nissan tps. __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

05-08-2010, 01:15 AM	#6
kamikazemkiii 3" Exhaust Join Date: Mar 2009 Location: raleigh Posts: 138	did you hook up the coils and wires the correct way?

05-08-2010, 02:34 AM	#7
tak2099 3" Exhaust Join Date: Jul 2007 Location: ohio Posts: 90	Yes the coils and wires are hooked up correctly. Ok, so I wired the stock tps back up, and modified my 80mm TB to use the stock one. Now it does go past 1800 rpms, BUT it still cuts out, but now its random. At WOT it goes just fine, but under normal driving it will randomly cut out. Do you guys think maybe my tps isnt adjusted right? Or maybe if my timing was off it could cause this? Or are both of those not things that would cause a random shut off? __________________ 1988 supra turbo. In process of modding:Roll cage, seats, dp, 3" intercooler, fuel upgrades, and turbo upgrades next.

05-08-2010, 03:54 AM	#8
kamikazemkiii 3" Exhaust Join Date: Mar 2009 Location: raleigh Posts: 138	could be the tps

05-08-2010, 09:06 PM	#10
supraflymkiii 3" Exhaust Join Date: Sep 2005 Location: Menasha, WI Posts: 63	He already said it was his TPS which is what I was going to say. Readjust it and it should be good to go. This was the first thing I ever had a problem with on my first Supra, so I know first hand what he's talking about.

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