Running rich and loping.

drateda.w.d · 10-26-2009, 01:57 PM

I've got a 91 turbo. I recently installed a 3" DP and catback. The car has no catalytic converters on it. It ran fine for a couple weeks. Then we got heavy rain and I was driving in it (I don't know if this means anything btw). No everytime I start the car it runs really rich and will buck badly if it's not semi warm before I drive it. When the car is warm it still lopes at idle (about 800-1000 rpm).

Any suggestions on what might be causing this? I was thinking some leak or O2 sensor myself. Thanks.

Ben · 10-26-2009, 02:00 PM

Sounds like it might be a coolant temp sensor

drateda.w.d · 10-26-2009, 02:05 PM

It runs bad when warm too? You think so?

That and I'm not getting any codes that I know of.

MR2BOY23 · 10-26-2009, 03:32 PM

Sounds like intake /exhaust leak

drateda.w.d · 10-26-2009, 09:35 PM

Running rich almost sounds like an intake leak to me....

Ben · 10-26-2009, 11:32 PM

800-1000 at idle is about right. The reason I think coolant temp sensor is because you say it runs rough and rich when cold. The coolant temp sensor does play part in how much fuel is used when warming up.

drateda.w.d · 10-27-2009, 12:00 AM

Quote:

Originally Posted by Ben

800-1000 at idle is about right. The reason I think coolant temp sensor is because you say it runs rough and rich when cold. The coolant temp sensor does play part in how much fuel is used when warming up.

The loping still happens when the car is warm too.

drateda.w.d · 10-27-2009, 07:26 PM

That would cause to run rich too?

Ben · 10-28-2009, 12:00 PM

The water temp sensor? Yes it can make the car run rich if it is bad

drateda.w.d · 10-28-2009, 01:07 PM

Ok, i'm just about to check to see if its throwing codes? Would it before I go start dismantling things?

drateda.w.d · 11-02-2009, 11:41 PM

So, what maps a car run rich? The water temp sensor, a dirty MAF... what else?

Ben · 11-03-2009, 12:16 AM

leaking injector, TPS, worn plugs/ignition system, O2 sensor

mattdouken · 11-03-2009, 01:10 AM

start your car, let it run rich and warm up and lope......unplug your Throttle position sensor, if the engine doesnt change, then the TPS is bad.

that what it seems to me is wrong.

drateda.w.d · 11-03-2009, 12:54 PM

Thanks. Let me test those couple things and replace the spark plugs.

10-26-2009, 01:57 PM	#1 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Running rich and loping. I've got a 91 turbo. I recently installed a 3" DP and catback. The car has no catalytic converters on it. It ran fine for a couple weeks. Then we got heavy rain and I was driving in it (I don't know if this means anything btw). No everytime I start the car it runs really rich and will buck badly if it's not semi warm before I drive it. When the car is warm it still lopes at idle (about 800-1000 rpm). Any suggestions on what might be causing this? I was thinking some leak or O2 sensor myself. Thanks.

10-26-2009, 02:05 PM	#3 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	It runs bad when warm too? You think so? That and I'm not getting any codes that I know of. Last edited by drateda.w.d; 10-26-2009 at 02:08 PM.. Reason: Add

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10-26-2009, 02:00 PM	#2 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	Sounds like it might be a coolant temp sensor

10-26-2009, 03:32 PM	#4 (permalink)
MR2BOY23 Some Skills Join Date: Aug 2009 Location: Auckland, New Zealand Posts: 64 Thanks: 0 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	Sounds like intake /exhaust leak

10-26-2009, 09:35 PM	#5 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Running rich almost sounds like an intake leak to me....

10-26-2009, 11:32 PM	#6 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	800-1000 at idle is about right. The reason I think coolant temp sensor is because you say it runs rough and rich when cold. The coolant temp sensor does play part in how much fuel is used when warming up.

10-27-2009, 07:26 PM	#8 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	That would cause to run rich too?

10-28-2009, 12:00 PM	#9 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	The water temp sensor? Yes it can make the car run rich if it is bad

10-28-2009, 01:07 PM	#10 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Ok, i'm just about to check to see if its throwing codes? Would it before I go start dismantling things?

11-02-2009, 11:41 PM	#11 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	So, what maps a car run rich? The water temp sensor, a dirty MAF... what else?

11-03-2009, 12:16 AM	#12 (permalink)
Ben Same In The End Join Date: Aug 2006 Location: Oceanside, CA / Reno, NV Posts: 4,274 Thanks: 20 Thanked 309 Times in 284 Posts My Google Map iTrader Rating: (16/100% )	leaking injector, TPS, worn plugs/ignition system, O2 sensor

11-03-2009, 01:10 AM	#13 (permalink)
mattdouken Driver Of The Seven Sea's Join Date: Sep 2008 Location: Greensboro,NC Posts: 701 Thanks: 53 Thanked 29 Times in 18 Posts iTrader Rating: (9/100% )	start your car, let it run rich and warm up and lope......unplug your Throttle position sensor, if the engine doesnt change, then the TPS is bad. that what it seems to me is wrong.

11-03-2009, 12:54 PM	#14 (permalink)
drateda.w.d Some Skills Join Date: Jul 2009 Location: Portland, Oregon Posts: 86 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (1/100% )	Thanks. Let me test those couple things and replace the spark plugs.