New Fuel Pump - No Throttle Response - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

milesprwr · 12-21-2008, 02:52 AM

Got an '89 240 w/ a red top sr20. Installed a Walbro 255 Fuel Pump recently and everything ran fine for a few days. Until today. Was driving down the highway and all of a sudden I wasn't getting any throttle response (engine was still running though). I pulled over and put it into first and started going again and I got throttle response back until about 2.5K RPMs and then it dies off. Gear selection doesn't matter, I can get to 2.5k and shift to 2nd or any other gear respectively and as long as i'm below 2.5k RPM's I still have throttle response. It's when I go over that point where there's nothing.

This problem is still persisting where the car won't get any throttle response past 2.5K RPMs. It idles ok but it sometimes dips down a little (a problem that began the same time this throttle response began).

It seems obvious it must be a problem with the pump. Would a faulty connection cause the pump to stop sending fuel after a certain point (i.e. 2.5K RPM)? I'm guessing there isn't a solid connection when I tried crimping the wires. I've also read that it could be my MAF.

Any ideas?

sillyvia13 · 12-21-2008, 03:16 AM

maf all day... I would say.
check the plug on maf itself , could have just loosened up from the POWER put DOWN! lol...
but yea mostly the maf, cause of rpm level...
check codes? in ecu?
gl bud, need more help just pm me...

milesprwr · 12-21-2008, 01:43 PM

Thanks! It was the MAF - I was on some bumpy highways so it must've shaken it out. I put it back in and secured it with duct tape so I shouldn't have that problem anymore. I don't know how I missed it when I took a look under the hood last night

Thanks again for the help!

nieko · 12-22-2008, 02:25 AM

not the duct tape!!! haha

get one of those little rectangle clips for it so it wont pop off!

milesprwr · 12-22-2008, 05:41 AM

Where can I get one of these clips at??

n240sxfnatic · 12-22-2008, 11:09 AM

Quote:

Originally Posted by milesprwr

Where can I get one of these clips at??

make one out of a paperclip

12-21-2008, 02:52 AM	#1
milesprwr Join Date: Sep 2008 Location: Los Angeles Age: 39 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	New Fuel Pump - No Throttle Response Got an '89 240 w/ a red top sr20. Installed a Walbro 255 Fuel Pump recently and everything ran fine for a few days. Until today. Was driving down the highway and all of a sudden I wasn't getting any throttle response (engine was still running though). I pulled over and put it into first and started going again and I got throttle response back until about 2.5K RPMs and then it dies off. Gear selection doesn't matter, I can get to 2.5k and shift to 2nd or any other gear respectively and as long as i'm below 2.5k RPM's I still have throttle response. It's when I go over that point where there's nothing. This problem is still persisting where the car won't get any throttle response past 2.5K RPMs. It idles ok but it sometimes dips down a little (a problem that began the same time this throttle response began). It seems obvious it must be a problem with the pump. Would a faulty connection cause the pump to stop sending fuel after a certain point (i.e. 2.5K RPM)? I'm guessing there isn't a solid connection when I tried crimping the wires. I've also read that it could be my MAF. Any ideas?

12-21-2008, 03:16 AM	#2
sillyvia13 BANNED Join Date: Jan 2006 Location: nh Posts: 1,645 Trader Rating: (1) Feedback Score: 1 reviews	maf all day... I would say. check the plug on maf itself , could have just loosened up from the POWER put DOWN! lol... but yea mostly the maf, cause of rpm level... check codes? in ecu? gl bud, need more help just pm me...

12-21-2008, 01:43 PM	#3
milesprwr Join Date: Sep 2008 Location: Los Angeles Age: 39 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	Thanks! It was the MAF - I was on some bumpy highways so it must've shaken it out. I put it back in and secured it with duct tape so I shouldn't have that problem anymore. I don't know how I missed it when I took a look under the hood last night Thanks again for the help!

12-22-2008, 02:25 AM	#4
nieko Post Whore! Join Date: Sep 2007 Location: Westminster Age: 34 Posts: 2,695 Trader Rating: (14) Feedback Score: 14 reviews	not the duct tape!!! haha get one of those little rectangle clips for it so it wont pop off!

12-22-2008, 05:41 AM	#5
milesprwr Join Date: Sep 2008 Location: Los Angeles Age: 39 Posts: 46 Trader Rating: (0) Feedback Score: 0 reviews	Where can I get one of these clips at??