89 5.0 running rich

5literbeater · May 24th, 2011, 03:29 AM

So my 89 5.0 5 spd runs rich as heck at idle. so much so it melted my catalytic converter.
mods:
block is supposedly a 306(what the previous owner said)
trick flow intake
24 lb injectors
80 mm maf calibrated for 24 lbs
75mm tb
595 lift cam(sorry i dont know make or specifics)
1.7 crane cams roller rockers
gt40 heads
373 gears

Now my question is are 24lbers too big? or what could be causing it to run rich enough to melt a cat and it makes your eyes water. Oh and its not tuned or anything. it passed emissions by a lot in all categories so that leads me to believe it isnt running rich while driving

flattusmaximus78 · May 24th, 2011, 10:40 AM

Scan for codes, maybe the car can tell you. Other wise, check for fuel in the vac line to the fpr. The diaphram might be bad. You also do not need those injectors.

5literbeater · May 26th, 2011, 04:35 AM

thankyou and will do, and ya i kinda figured i didnt need the injectors that was the previous owners doing, im just hoping i can grow into them lol

dblzroracin · May 26th, 2011, 10:04 AM

93 cobras came with 24# injectors from the factory. The 24# injectors should be ok for what you have as long as the fuel pressure is set right. Do you have an adjustable fuel pressure regulator & FP gauge? Do you think that your converters may have been clogged up?

kmedeiros88 · May 26th, 2011, 05:02 PM

I have 24# injectors with just an exhaust and intake system and I'm not running rich at all. Just in case I decide to upgrade in the future.

428CJ · May 26th, 2011, 05:42 PM

You could try replacing the ECT and ACT. My car ran super rich (melted all of my cats) so i replaced those sensors and it runs much leaner now.

5literbeater · May 26th, 2011, 07:32 PM

ill take all these into consideration, i bought a code reader per maximus's advice so ill see what it says and keep you guys posted. btw idk if the cats were clogged but i heard what sounded like birdshot bouncing around in my exhaust and looked under and the cat was red hot which leads me to believe its melted

kmedeiros88 · May 26th, 2011, 10:37 PM

You better hope that code reader works. I bought an actron one and it never worked correctly. Overpriced POS. Now I just use a jumper and a test light with no problems.

5literbeater · May 27th, 2011, 05:26 PM

fuu i have the actron one too lol

kmedeiros88 · May 27th, 2011, 05:29 PM

It might work on your car. I know it doesnt on mine and I've tried it many times. It goes through all the actuators and relays and then the stupid thing just beeps and stays solid red without giving me any codes.

May 24th, 2011, 03:29 AM	#1
5literbeater Newbie 89 5.0 mustang lx hatch 13.? Join Date: May 2011 Location: AZ Posts: 4 iTrader: 0 reviews	89 5.0 running rich So my 89 5.0 5 spd runs rich as heck at idle. so much so it melted my catalytic converter. mods: block is supposedly a 306(what the previous owner said) trick flow intake 24 lb injectors 80 mm maf calibrated for 24 lbs 75mm tb 595 lift cam(sorry i dont know make or specifics) 1.7 crane cams roller rockers gt40 heads 373 gears Now my question is are 24lbers too big? or what could be causing it to run rich enough to melt a cat and it makes your eyes water. Oh and its not tuned or anything. it passed emissions by a lot in all categories so that leads me to believe it isnt running rich while driving

May 24th, 2011, 10:40 AM	#2
flattusmaximus78 I Post Entirely Way Too Much 1993 5.ohhhh 12.97 @140mph Join Date: Apr 2006 Location: Gatorland Posts: 6,122 iTrader: 3 reviews	Scan for codes, maybe the car can tell you. Other wise, check for fuel in the vac line to the fpr. The diaphram might be bad. You also do not need those injectors. __________________ 02 Pewter z28, hoosiers/lid/exhaust/spray...125mph 1993 gt Sold, already missed --Moates Quarter horse $225-- --Cobra intake $150-- --tremec 3550 bell and shifter $1100--

May 26th, 2011, 10:04 AM	#4
dblzroracin Regular 92 Mustang GT vert Join Date: Aug 2005 Location: Memphis, TN Posts: 151 iTrader: 0 reviews	93 cobras came with 24# injectors from the factory. The 24# injectors should be ok for what you have as long as the fuel pressure is set right. Do you have an adjustable fuel pressure regulator & FP gauge? Do you think that your converters may have been clogged up? __________________ www.bbandtracing.com

May 26th, 2011, 05:42 PM	#6
428CJ Regular Join Date: Oct 2010 Location: Boise, Id Posts: 142 iTrader: 0 reviews	You could try replacing the ECT and ACT. My car ran super rich (melted all of my cats) so i replaced those sensors and it runs much leaner now. __________________ 1988 Mustang: 5 speed, hurst shifter, plenty slow.

Threads Similar to: 89 5.0 running rich
Thread	Thread Starter	Forum	Replies	Last Post
Running Rich	Scott2001GT	99-04	41	June 29th, 2010 02:01 PM
Car running really rich	BDaily	99-04	5	October 28th, 2009 11:57 AM
Running rich so rich it smokes like BBQ	hkaiser83	5.0 Mustangs	7	September 21st, 2008 11:10 AM
Running Rich	PowerShiftz02GT	99-04	5	May 29th, 2008 09:44 PM
car running rich	sixpack	5.0 Mustangs	14	May 25th, 2008 10:35 PM

May 26th, 2011, 04:35 AM	#3
5literbeater Newbie 89 5.0 mustang lx hatch 13.? Join Date: May 2011 Location: AZ Posts: 4 iTrader: 0 reviews	thankyou and will do, and ya i kinda figured i didnt need the injectors that was the previous owners doing, im just hoping i can grow into them lol

May 26th, 2011, 05:02 PM	#5
kmedeiros88 Regular 89 Mustang LX Hatch Join Date: Feb 2011 Location: Fall River, MA Posts: 324 iTrader: 0 reviews	I have 24# injectors with just an exhaust and intake system and I'm not running rich at all. Just in case I decide to upgrade in the future.

May 26th, 2011, 07:32 PM	#7
5literbeater Newbie 89 5.0 mustang lx hatch 13.? Join Date: May 2011 Location: AZ Posts: 4 iTrader: 0 reviews	ill take all these into consideration, i bought a code reader per maximus's advice so ill see what it says and keep you guys posted. btw idk if the cats were clogged but i heard what sounded like birdshot bouncing around in my exhaust and looked under and the cat was red hot which leads me to believe its melted

May 26th, 2011, 10:37 PM	#8
kmedeiros88 Regular 89 Mustang LX Hatch Join Date: Feb 2011 Location: Fall River, MA Posts: 324 iTrader: 0 reviews	You better hope that code reader works. I bought an actron one and it never worked correctly. Overpriced POS. Now I just use a jumper and a test light with no problems.

May 27th, 2011, 05:26 PM	#9
5literbeater Newbie 89 5.0 mustang lx hatch 13.? Join Date: May 2011 Location: AZ Posts: 4 iTrader: 0 reviews	fuu i have the actron one too lol

May 27th, 2011, 05:29 PM	#10
kmedeiros88 Regular 89 Mustang LX Hatch Join Date: Feb 2011 Location: Fall River, MA Posts: 324 iTrader: 0 reviews	It might work on your car. I know it doesnt on mine and I've tried it many times. It goes through all the actuators and relays and then the stupid thing just beeps and stays solid red without giving me any codes.

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

All times are GMT -4. The time now is 03:09 AM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.