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!!!! https://www.nopistons.com/forums/pub...1047683358.gif

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!!!!!!!!!!!!!!!!!!!!!!!!!!

umm yucky injectors and old radiator caps?

I'm thinking there is an intake leak or a crack on the manifold and its not noticeable until the car warms up and the metal starts changing. Let it warm up again and spray some water or carb cleaner and spray it in the area of which I'm talking about... Sometimes those plastic intake pipes have cracks in them too

2. happens to me all the time, when the idle starts dropping, it's like the car automatically keeps it alive

Sounds like a fuel problem....in sequence, I would do the following:

from the injectors back.......check the fuel filter.....check the fuel pressure, it should be about 40 pounds, if that fails, check the pick up screen on the pump in the tank



Run some injector cleaner through the tank

Spray carb cleaner in the throttle body



Clean everything as much as possible.......then check for vacuum leaks

I've heard of this before; I can't remember what the hell it was though..

i would check the MAF

if its s5 look for codes

Here's more info:



I put fuel injector cleaner in it to no avail



Took it to 3 shops, and NONE can figure it out



Looked for leaks, none apparent, I'm thinking it's a fuel or maybe computer problem.......can't be because it's warm because if you kill it for two seconds, it's not gonna cool down that fast...and it works perfectly again for five minutes after you kill the car for two seconds...I'm thinking maybe either a computer-related problem, or maybe timing, cause eventually a small gap in timing would become a HUGE timing gap the longer its run...Tell me if I'm an idiot or what...I've checked leaks, none apparent, No other problems, can't be because it's warm. I'll replace the injectors with the ones off of my other seven, which are brand (almost) new...I'll update this as soon as info becomes available. Thank you all for your help, and please keep helping!!! https://www.nopistons.com/forums/pub...1047683894.gif please fix it https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

fuel filter? or the screen in the tank? (as someone mentioned earlier)



turn off, crud in gas settles. turn on, go flows fine, until crud gets stirred up.

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...

You need to specify what year your car is. Did anyone work on it before the problem started?

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

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.

Your filter on the pump is probably clogged up. Whick caused your pump to overheat.

This one is really interesting me... I ordered a new fuel pump just in case, and if it's gone, the new one will go in. I should probably just put it in anyways, seeing as how it's been sitting forever and might screw up again. My friend's dad is looking at it, he'll let me know what's up tomorrow.

But that usually causes your car to stall around turns and stuff before it causes your car to stall/sputter all together...

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.

This sounds kinda far-fetched but hear me out.



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.

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 https://www.nopistons.com/forums/pub...#>/BURNOUT.gif



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!!! https://www.nopistons.com/forums/pub...IR#>/boink.gif https://www.nopistons.com/forums/pub...IR#>/boink.gif https://www.nopistons.com/forums/pub...IR#>/boink.gif

Good Deal man!



https://www.nopistons.com/forums/pub...1047683329.gif https://www.nopistons.com/forums/pub...1047683329.gif https://www.nopistons.com/forums/pub...1047683329.gif https://www.nopistons.com/forums/pub...1047683329.gif

Congrats, but damn you got ripped off on the fuel pump. If you can take it back and get a walbro 255lpg upgrade for $100ish

Let's just say time wasn't on my side, and with a lifetime guarantee on this one, I won't be needing another.

nice job

HEY THANKS ALOT GUYS!!!!!!!!! lol im a 15 year old with a 17 year old car lol oh well. neway my car is doing the exact same thing as yours. i can take fuses out and and in it will try to start but when i try after that it just turns over my mufflers and **** off my racing exhaust are off so the exhaust makes this loud pooping noise every time it turns over. but thanks to you guys i know what the problem is. the only other thing i have to fix is the rear main its leaking . i lost half of my oil first day i refilled it. came out in the morning and it was on the the driveway running towards the road lol. https://www.nopistons.com/forums/pub...IR#>/boink.gif https://www.nopistons.com/forums/pub...IR#>/boink.gif



lol oh well im a little to childish ill get it fixxed for christmass and im gonna take it to my schools auto shop since im in the auto program and get the rear main put in. i dont have the equip for that at home. one of the ways i found out about fuel pumps was i learned about spraying gass through the throttle and it would get the car to kick over and then you would know if it was "starving for fuel". lol you are car gods that have the

equipment to fix your parts. im gonna get my dad to bring his compressor and his torque wrenches and were gonna start checking for problems https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683894.gif

Do you guys remember what it was like to be this enthusiastic? I miss those days...........https://www.nopistons.com/forums/pub...O_DIR#>/11.gif

Yup - Every time I drive my car. I keep it garaged and try not to drive it in bad weather. If I know its going to be a nice day the next day and I have decided to taske the 7 to work I still get excited the night before.



I look out the office at my car during the day and look for an excuse to drive it somewhere.



If I know I am Autocrossinf it the next weekend that week cannot go past fast enough and I hardly sleep the night before the race.



Now I am dealing with what is possibly a screwed side seal ( courtesy of a couple of 30+ PSI boosts during a malfunction this past july - she hung in there to everyones amazement for 6 more months) and I will not be driving it for at least 3 weeks if not a month. I am depressed right now.

im glad im enthusiastic :b lol i can run my car soon drive vroom vroom

I didn't say it was bad, just miss it. My FC is acting weird (again). Here's my NEW problem.



After about 5 minutes of driving, the temp. gauge says its' ON FIRE!!! I popped the hood after I pulled over, and it's not steaming. NO boiling, NO NOTHING. The only thing that's hot is the radiator hose. The radiator is ICE cold, and the engine is still warm to the touch. What gives? Should I drive it? Is my temp gauge screwed again? https://www.nopistons.com/forums/pub...IR#>/dunno.gif

lol 3 weeks? i havent drove my fc since the day i got my liscnse.. that was 3 months ago.





mom thought it would be a gggreeeattt idea so take it to the dealer.



now i have a 800 dollar repair bill and she expects me to pay it



oh and it still doesnt run

I know several n/a guys WHO would kill to be in your shoes.....