misfire on sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

91blk240 · 08-27-2002, 07:25 PM

I am having a problem that seems to happen around half throttle.  It doesn't matter what the RPMS are at.  When i go to half throttle or higher the motor seems to cut in and out really bad, it seems like its missfiring.  If i rev the motor out of gear it oesn't appear to do it that bad.  I tried driving it at full throttle in 4th gear at a low speed and it cuts in and out even at really low RPMS.  It starts to happen really bad at around 2 psi.

I really don't know where to start so if anybody could help me out i woul appreciate it.  Its an S13 redtop in a 91 240

Thanks

S14 Drift! · 08-28-2002, 09:01 AM

What is your sparkplug gap set at?

It should be around 25 ~ 30 not more then that...otherwise you'll get misfire!

Foxcolt · 08-28-2002, 09:17 AM

Might be the TPS. I had a bad TPS and my motor would backfire when I applied a lot of throttle.

Try adjusting it for sits and giggles. What rpm do you idle at?

08-27-2002, 07:25 PM	#1
91blk240 Zilvia Junkie Join Date: Mar 2002 Location: DeFuniak Springs, FL Age: 47 Posts: 326 Trader Rating: (0) Feedback Score: 0 reviews	I am having a problem that seems to happen around half throttle.  It doesn't matter what the RPMS are at.  When i go to half throttle or higher the motor seems to cut in and out really bad, it seems like its missfiring.  If i rev the motor out of gear it oesn't appear to do it that bad.  I tried driving it at full throttle in 4th gear at a low speed and it cuts in and out even at really low RPMS.  It starts to happen really bad at around 2 psi. I really don't know where to start so if anybody could help me out i woul appreciate it.  Its an S13 redtop in a 91 240 Thanks __________________ RIP: 91 Black Coupe - Lost in Katrina Current: 93 Black Coupe blown s13 blacktop

08-28-2002, 09:17 AM	#3
Foxcolt Zilvia FREAK! Join Date: Apr 2002 Location: Northern VA Posts: 1,264 Trader Rating: (0) Feedback Score: 0 reviews	Might be the TPS. I had a bad TPS and my motor would backfire when I applied a lot of throttle. Try adjusting it for sits and giggles. What rpm do you idle at? __________________ Driftec www.midatlantic240sx.com

08-28-2002, 09:01 AM	#2
S14 Drift! Join Date: Aug 2002 Posts: 23 Trader Rating: (0) Feedback Score: 0 reviews	What is your sparkplug gap set at? It should be around 25 ~ 30 not more then that...otherwise you'll get misfire!