runs good runs like crap

thecrowe · 06-01-2011, 11:17 AM

i have a fd 93 single turbo set up fuel upgrade full exhaust no cats power fc block off plates the norm got hurt so the car sat for a year i got it running started fine ran on the rich side let it run for a hour. came back 24hrs later car will start but has a rough idle running real richwill not stay running. checked map sensor it working fine checked plugs they where fouled out cleaned installed still ran the same checked coolant sensor it's working fine o2 sensor is new it did have a lot of carbon cleaned it still the same checked harness to ecm it see if it came unpluged it was fine batttery is at 13volts I removed all emmissions and acv valve i have a racing works throttle body I can't seem to figure out what happened it worked fine and now it will not run It seems to be running very rich your suggestions would be great the motor was rebuilt 12,000 miles it ran fine then I don't know

cewrx7r1 · 06-01-2011, 09:50 PM

Sitting for a year: Your injectors and fuel system are most likely gummed up.
Drain and flush the tank and fuel lines, remove injectors and have them cleaned.

You should have had someone drive the car once a week while you were recovering!

Fendamonky · 06-03-2011, 12:14 PM

Mine will have been sitting for 6 months when I get home (250 miles on the rebuild), hopefully I don't have the same issues!!!

Signal 2 · 06-10-2011, 02:55 PM

Before you go to the trouble and expense of yanking the injectors, I'd put fresh gas in it, a NEW set of plugs and some BG or other quality fuel system cleaner and drive hell out of it. Get it up to full temp and keep it there. Maybe some highway, but go through at least a tank of gas and see if there's some improvement.

Force13b · 06-10-2011, 04:21 PM

The off the shelf injector cleaners don't help much.
http://www.automotiveforums.com/t542...ers_tests.html

Signal 2 · 06-14-2011, 01:41 PM

Although it's available in some parts stores (assume it's the same formulation as shops have) BG44k is not really an "off the shelf" cleaner. I've had two separate shops tell me it's effective. Both owner's opinions I trust. That's why I recommended it.
Anecdotally, I've also used Chevron/Techron stuff about twice a year since buying my car. About two years ago I sent my injectors in for cleaning and flow testing at 90k miles. IIRC I gained less than 2% from before to after on the bench.

Pulling the injectors is premature IMO.

06-01-2011, 11:17 AM	#1
thecrowe The Newbie Join Date: Apr 2010 iTrader: (0) Posts: 16 Rep Power: 0	runs good runs like crap i have a fd 93 single turbo set up fuel upgrade full exhaust no cats power fc block off plates the norm got hurt so the car sat for a year i got it running started fine ran on the rich side let it run for a hour. came back 24hrs later car will start but has a rough idle running real richwill not stay running. checked map sensor it working fine checked plugs they where fouled out cleaned installed still ran the same checked coolant sensor it's working fine o2 sensor is new it did have a lot of carbon cleaned it still the same checked harness to ecm it see if it came unpluged it was fine batttery is at 13volts I removed all emmissions and acv valve i have a racing works throttle body I can't seem to figure out what happened it worked fine and now it will not run It seems to be running very rich your suggestions would be great the motor was rebuilt 12,000 miles it ran fine then I don't know

06-10-2011, 02:55 PM	#4
Signal 2 Viable Fossil Join Date: Mar 2008 Location: Mid-West iTrader: (0) Posts: 199 Rep Power: 17	Before you go to the trouble and expense of yanking the injectors, I'd put fresh gas in it, a NEW set of plugs and some BG or other quality fuel system cleaner and drive hell out of it. Get it up to full temp and keep it there. Maybe some highway, but go through at least a tank of gas and see if there's some improvement. __________________ Jim VR R1 FD

06-14-2011, 01:41 PM	#6
Signal 2 Viable Fossil Join Date: Mar 2008 Location: Mid-West iTrader: (0) Posts: 199 Rep Power: 17	Although it's available in some parts stores (assume it's the same formulation as shops have) BG44k is not really an "off the shelf" cleaner. I've had two separate shops tell me it's effective. Both owner's opinions I trust. That's why I recommended it. Anecdotally, I've also used Chevron/Techron stuff about twice a year since buying my car. About two years ago I sent my injectors in for cleaning and flow testing at 90k miles. IIRC I gained less than 2% from before to after on the bench. Pulling the injectors is premature IMO. __________________ Jim VR R1 FD Last edited by Signal 2; 06-14-2011 at 01:43 PM..

06-01-2011, 09:50 PM	#2
cewrx7r1 The Judge Join Date: Feb 2008 iTrader: (0) Posts: 196 Rep Power: 17	Sitting for a year: Your injectors and fuel system are most likely gummed up. Drain and flush the tank and fuel lines, remove injectors and have them cleaned. You should have had someone drive the car once a week while you were recovering!

06-10-2011, 04:21 PM	#5
Force13b cxxxx\|::::::::::::> Join Date: Nov 2009 iTrader: (1) Posts: 315 Rep Power: 16	The off the shelf injector cleaners don't help much. http://www.automotiveforums.com/t542...ers_tests.html