my car starts but runs poorly

maui_boi · 09-13-2008, 10:14 PM

my car starts up and everything but dosent keep idle and when i drive it it starts to bog and loss power at 4000rpm anybody got suggestions

Polito Racing · 09-13-2008, 10:27 PM

what kind of car is it? does it have any modifications? what exactly is it doing? the idle thing could be a loose vaccum. About the 4000 rpm it sounds like a transition problem since its happening arround where the secondaries kick in. my advices are check your compression on the engine and make sure you have compression on all faces on both rotors, check all your vaccum hoses and get you some starting fluid and carefully and without loosing your eyebrows!!! spray it arround your engine to check for leaks. You will know where the leak is at because the acceleration in the engine will change and run some nice thick ground cables from the shock towers to your engine to see if this help with your hessitation problem. not sure if available on this forum but do a search for 3500rpm hessitation and you'll find what your looking for.

Good luck

Phoenix7 · 09-13-2008, 10:52 PM

+1^^^

mileage?

When was your last tune up?
How old are the spark plugs?
TPS within specs?

http://www.rotarycarclub.com/showthr...service+manual

maui_boi · 09-14-2008, 01:58 AM

the car is a 88 n/a with 93k miles we just changed the plugs and the car starts up fine its just dosent want to stay idle when first started it stays after a while of running. for the 4000rpm part it sputters and starts to bog out but still goes and picks up rpm slow like just sputtering and stuff i dunno how to xplain it maybe if i can ill post a video or sound or something to let u guys know if i know how lol

Phoenix7 · 09-14-2008, 02:05 AM

Tps?

Whizbang · 09-14-2008, 08:42 AM

did you look into the condition of the injectors?

vex · 09-14-2008, 02:32 PM

Quote:

Originally Posted by Low Impedance

did you look into the condition of the injectors?

+1, check your injectors and get them shipped out to be clean.

maui_boi · 09-14-2008, 01:24 PM

not yet but also where is the secondary injectors i dunno where they are or to check it

Phoenix7 · 09-14-2008, 01:39 PM

did you check the FSM? They're on the top-most rail:
http://foxed.ca/rx7manual/manuals/19...SYSTEMS_NA.pdf

Time to get to work. Let us know what you find out.

maui_boi · 09-14-2008, 02:07 PM

where is the TPS

maui_boi · 09-14-2008, 02:45 PM

but where can i find and check the secondary injectors so i can just get em all one time

vex · 09-14-2008, 02:57 PM

Quote:

Originally Posted by maui_boi

but where can i find and check the secondary injectors so i can just get em all one time

Secondary injectors are located on the top of the first bend on the Upper intake manifold. The two injectors located on the outer edges of the runners.

The primaries are buried under the UIM and the UIM will need to be removed for you to gain access to them. Happy hunting!

maui_boi · 09-14-2008, 03:03 PM

so the secondarys are on top and the primary is underneath?? on the n/a right?

vex · 09-14-2008, 03:24 PM

Quote:

Originally Posted by maui_boi

so the secondarys are on top and the primary is underneath?? on the n/a right?

yup

maui_boi · 09-14-2008, 08:10 PM

k i checked all of it and they work and i disconnected the TPS and it idled good just still getting that bad runing at and after 4000rpm

09-13-2008, 10:14 PM	#1
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	my car starts but runs poorly my car starts up and everything but dosent keep idle and when i drive it it starts to bog and loss power at 4000rpm anybody got suggestions

09-13-2008, 10:27 PM	#2
Polito Racing so you got pistons oh wow Join Date: Mar 2008 Location: Raeford NC Posts: 87 Rep Power: 18	what kind of car is it? does it have any modifications? what exactly is it doing? the idle thing could be a loose vaccum. About the 4000 rpm it sounds like a transition problem since its happening arround where the secondaries kick in. my advices are check your compression on the engine and make sure you have compression on all faces on both rotors, check all your vaccum hoses and get you some starting fluid and carefully and without loosing your eyebrows!!! spray it arround your engine to check for leaks. You will know where the leak is at because the acceleration in the engine will change and run some nice thick ground cables from the shock towers to your engine to see if this help with your hessitation problem. not sure if available on this forum but do a search for 3500rpm hessitation and you'll find what your looking for. Good luck __________________ Polito Racing 2000 F-350 SD (Daily Driver) 2002 CBR 954RR (Back on the Road) 1987 RX-7 Turbo II(red bullet!!)

09-14-2008, 08:42 AM	#6
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 21	did you look into the condition of the injectors? __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

09-14-2008, 01:58 AM	#4
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	the car is a 88 n/a with 93k miles we just changed the plugs and the car starts up fine its just dosent want to stay idle when first started it stays after a while of running. for the 4000rpm part it sputters and starts to bog out but still goes and picks up rpm slow like just sputtering and stuff i dunno how to xplain it maybe if i can ill post a video or sound or something to let u guys know if i know how lol

09-14-2008, 01:24 PM	#8
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	not yet but also where is the secondary injectors i dunno where they are or to check it

09-14-2008, 02:07 PM	#10
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	where is the TPS

09-14-2008, 02:45 PM	#11
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	but where can i find and check the secondary injectors so i can just get em all one time

09-14-2008, 03:03 PM	#13
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	so the secondarys are on top and the primary is underneath?? on the n/a right?

09-14-2008, 08:10 PM	#15
maui_boi FC Rotary Power Join Date: Sep 2008 Location: MAUI, HAWAII Posts: 24 Rep Power: 0	k i checked all of it and they work and i disconnected the TPS and it idled good just still getting that bad runing at and after 4000rpm