$64,000 Question....
12-05-2003, 03:10 PM
#11
Junior Member
Join Date: Nov 2002
Location: Ohio
Posts: 5
OK.......I'll add this one just to show that ANYTHING is possible......it happened on my S5 racer.....
Under no load, the car would rev to the redline with no problem......under load, it would die at 2000 RPM like it was out of fuel.......so I thrashed away.....when I checked the fuel pressure, it was way low, so I ordered a new pump and tofe it apart to replace it. When I got the pump out of the tank, I found that the rubber hose connecting the pump to the line had slipped off! I threw a tantrum for a bit, cancelled the new pump, checked the fuel pressure.....40 pounds!
Anything can happen...........don't rule anything out. Be methodical and **** when checking. You won't regret it...
Under no load, the car would rev to the redline with no problem......under load, it would die at 2000 RPM like it was out of fuel.......so I thrashed away.....when I checked the fuel pressure, it was way low, so I ordered a new pump and tofe it apart to replace it. When I got the pump out of the tank, I found that the rubber hose connecting the pump to the line had slipped off! I threw a tantrum for a bit, cancelled the new pump, checked the fuel pressure.....40 pounds!
Anything can happen...........don't rule anything out. Be methodical and **** when checking. You won't regret it...
12-05-2003, 11:12 PM
#13
Senior Member
Thread Starter
Join Date: Nov 2003
Location: Caldwell, Idaho
Posts: 228
Sorry. Here's more info
1986 Rx-7 n/a GXL (13b of course)
bone stock
been sitting for around 8 mos. but started right up
Had that problem but here's a good piece of NEW info: The car's dead. Won't start. Just keeps turning. I tried yanking the fuses under the hood to clear the flooding problem, it'd kick a lil, then go back to just turning. I think my fuel pump died, and I probably wasn't getting 40 pounds. I'm taking it to a friend tomorrow to have it checked out... Hopefully he'll have some ideas...Keep posting, and maybe it'll help him out. thank you all for your help,
Joel
1986 Rx-7 n/a GXL (13b of course)
bone stock
been sitting for around 8 mos. but started right up
Had that problem but here's a good piece of NEW info: The car's dead. Won't start. Just keeps turning. I tried yanking the fuses under the hood to clear the flooding problem, it'd kick a lil, then go back to just turning. I think my fuel pump died, and I probably wasn't getting 40 pounds. I'm taking it to a friend tomorrow to have it checked out... Hopefully he'll have some ideas...Keep posting, and maybe it'll help him out. thank you all for your help,
Joel
12-06-2003, 06:51 AM
#14
Senior Member
Join Date: Dec 2001
Location: Louisville KY 40299
Posts: 344
Im gonna go with an electrical problem. Though what exactly, I dunno...
I dont think its a mechanical ( fuel pressure...vacuum leak...etc... ) because of the fact that it does it after ~5 minutes and if you turn the car off and turn it RIGHT back on, it doesnt do it.
I dont think its a mechanical ( fuel pressure...vacuum leak...etc... ) because of the fact that it does it after ~5 minutes and if you turn the car off and turn it RIGHT back on, it doesnt do it.
12-06-2003, 09:23 PM
#16
Senior Member
Thread Starter
Join Date: Nov 2003
Location: Caldwell, Idaho
Posts: 228
Originally Posted by neevosh' date='Dec 6 2003, 12:05 PM
Your filter on the pump is probably clogged up. Whick caused your pump to overheat.
12-09-2003, 04:26 PM
#18
Senior Member
Join Date: Dec 2001
Location: Jensen Beach, FL / Sylva, NC
Posts: 2,934
Have you pressure tested the fuel system yet?
I would do the basics to the car. New air cleaner plugs wires and fuel filter.
Then check the fuel pressure. Or if you can afford to drop in a new pump although the old one might be fine.
Ground your engine better the stock ground sucks. Ground your fuse strip and your ECU. All these things need to be done anyway and are cheap to do.
Thats where I would start.
Also - I had the same problem a DaveB with the hose slipping off the fuel pump. It will take you abot 15 minutes to pull your pump and check it out.
I would do the basics to the car. New air cleaner plugs wires and fuel filter.
Then check the fuel pressure. Or if you can afford to drop in a new pump although the old one might be fine.
Ground your engine better the stock ground sucks. Ground your fuse strip and your ECU. All these things need to be done anyway and are cheap to do.
Thats where I would start.
Also - I had the same problem a DaveB with the hose slipping off the fuel pump. It will take you abot 15 minutes to pull your pump and check it out.
12-10-2003, 08:45 AM
#19
Senior Member
Join Date: Nov 2002
Location: Central KY
Posts: 292
Originally Posted by rotary_revolution_0' date='Dec 4 2003, 09:56 PM
This is BY FAR the weirdest problem I've EVER had with ANY car.... I bought another rx-7 cause my other one isn't streetable. I got it for 500 bucks from a friend, and it starts right up, and idles at a perfect 750. Doesn't overheat, doesn't leak, doesn't make any weird noises, nada. Perfecto. Well, one problem:
After about 5 minutes of PERFECT driving, the accelerator gets weird. It breaks down into two things:
1. It starts making a weird like clicking-and-hissing sound when you push on the gas, and it hesitates, and eventually bogs down....If you keep the gas pedal depressed, it'll die...
2. When you let of the gas after it starts doing this, the RPMs kick up a little, kinda like pushing it IN really fast, then letting off, but i'm just letting off....weird......
3. Here's the even WEIRDER part: If you turn the car off, and start it back up in literally TWO seconds, it'll run PERFECT again for another 5 minutes!!!!
When driving it to the shop, I had to kill my car 10 times on the freeway with the clutch in, starting it back into 5th gear, and it got there just fine!!!
HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!
After about 5 minutes of PERFECT driving, the accelerator gets weird. It breaks down into two things:
1. It starts making a weird like clicking-and-hissing sound when you push on the gas, and it hesitates, and eventually bogs down....If you keep the gas pedal depressed, it'll die...
2. When you let of the gas after it starts doing this, the RPMs kick up a little, kinda like pushing it IN really fast, then letting off, but i'm just letting off....weird......
3. Here's the even WEIRDER part: If you turn the car off, and start it back up in literally TWO seconds, it'll run PERFECT again for another 5 minutes!!!!
When driving it to the shop, I had to kill my car 10 times on the freeway with the clutch in, starting it back into 5th gear, and it got there just fine!!!
HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!
Could the 5 minute interval be like 7 minutes??? The ECU safety "limp" mode kicks in after 7 minutes or so. This would explain why the problem stops after turning the car off and back on... You are resetting the ECU.
I know it does not diagnose the problem any better but at least it takes one of the variables out of the equation.
Aside from that above... It definitely sounds like fuel delivery problems, namely the fuel pump. Which may have made your ECU act goofy. As the fuel pump was failing your ECU was prolly going into LIMP mode.
12-11-2003, 12:19 PM
#20
Senior Member
Thread Starter
Join Date: Nov 2003
Location: Caldwell, Idaho
Posts: 228
I finally fixed my car YAY!!! Here's ALL that was wrong/had to be replaced:
Fuel Pump (wires twisted in gas tank)
Fuel Filter (Broke off and was sitting at bottom of fuel tank)
Fuel Rail w/ Fuel Pressure regulator (flooding the car at start-up w/ new filter
Thermostat
Radiator cap (bad pressure)
Radiator (clogged)
Electric fan in place of mechanical (fan clutch burned out)
Water pump (was rusted through)
Gauge cluster (a bunch of gauges weren't working, and I got sick of it)
Master & slave cylinder (clutch kept goin' dry)
Fuel cut-off installed so the car starts now
Temperature switch assembly? (forget what it's called, it turns on at certain temp)
the only thing i haven't fixed yet is that stupid ANNOYING BUZZER!!!!!!
I JUST WANT TO MURDER IT, AND I DIDN'T WANT TO BREAK IT OUT OF THE GAUGE CLUSTER!!! It's driving me insane. It's just the Add Coolant sensor burned out, so it's not grounding, and BEEEEEEEEEEEEEEEEEEEEEEEEP!!! I even tried grounding out the sensor, but no dice... Oh well, it'll burn out soon.
I finally got in my car and
the best part is the only things I actually bought were these:
Fuel pump 130
Fuel filter 15
Thermostat 8
Switch for fuel cut-off 1.99
All of the other stuff I ripped out of my other seven with new stuff on it. HAHAHAHAHAHAHAHAHAHA!!! Yeah Baby!!!
Fuel Pump (wires twisted in gas tank)
Fuel Filter (Broke off and was sitting at bottom of fuel tank)
Fuel Rail w/ Fuel Pressure regulator (flooding the car at start-up w/ new filter
Thermostat
Radiator cap (bad pressure)
Radiator (clogged)
Electric fan in place of mechanical (fan clutch burned out)
Water pump (was rusted through)
Gauge cluster (a bunch of gauges weren't working, and I got sick of it)
Master & slave cylinder (clutch kept goin' dry)
Fuel cut-off installed so the car starts now
Temperature switch assembly? (forget what it's called, it turns on at certain temp)
the only thing i haven't fixed yet is that stupid ANNOYING BUZZER!!!!!!
I JUST WANT TO MURDER IT, AND I DIDN'T WANT TO BREAK IT OUT OF THE GAUGE CLUSTER!!! It's driving me insane. It's just the Add Coolant sensor burned out, so it's not grounding, and BEEEEEEEEEEEEEEEEEEEEEEEEP!!! I even tried grounding out the sensor, but no dice... Oh well, it'll burn out soon.
I finally got in my car and
the best part is the only things I actually bought were these:
Fuel pump 130
Fuel filter 15
Thermostat 8
Switch for fuel cut-off 1.99
All of the other stuff I ripped out of my other seven with new stuff on it. HAHAHAHAHAHAHAHAHAHA!!! Yeah Baby!!!