|
fuel injected 302 guru needed!
i hope someone can answer my question.
i have a 302--24lbs injectors--c&l mass air meter housing 73mm edelbrock 65mm throttle body.stock 92 notchback ecm-- stock air flow meter,e cam,edelbrock aluminum performer heads. when the car is started cold-starts and stalls atleast 5 times. when the car is warm and crusing the car hesitates alot,only when at 25% throttle or under--i have checked all of the basics. the car had a cobra computer in it,i was told a cobra computer is not the best-so installed stock one any help??? dave |
The tables in the EEC must match the air meter flow calibration and injector size. The Cobra EEC is set for 24lb injectors and stock air flow meter.
If you are using a non-Cobra EEC (like an A9L, A9P, A9M) it is set for 19 lb injectors. You need a custom air meter calibration or a tool that changes the ECC tables (like a twEECer or EEC tuner). |
do you know the part number for the air flow meter--non
cobra computer model--i was told you cannot get a cobra air flow meter unless you buy the computer and the injectors--do you know if the stock air flow meter is adjustable? thanks dave |
assuming your C&L is calibrated for 24# inj. Do you have access to another (not C&L) 24# meter? I've heard over and over again about driving problems with the C&Ls.
|
If you're running the Cobra computer, you'll need a MAF meter calibrated for 19# injectors, just like the stocker. The conversion to 24# injector fuel maps is done inside the 'puter.
If you're running a non-Cobra computer (A9L, A9P, etc.), you'll need a meter calibrated for 24# injectors. I've had terrible luck with C&L meters doing exactly what you described. They're calibrated WAY lean, which leads to the following.... - cold start problems...stalling, surging, etc. - lean misfire and popping back through the intake during part throttle operation on a cold engine - the exhaust will burn your eyes which makes you think it's rich....it's not...it's SUPER lean - the car will basically fall on it's face until the operating temp is high enough to let the computer go closed loop, at which point the 02 sensors provide feedback and fuel trim to richen the mixture up a bit. With the cobra computer, find somebody w/ a stock MAF meter and swap it in for a trial...I bet you'll find it runs very well. With the non-cobra computer, you'll need to find another meter calibrated for 24's. If you want a bigger meter, go with a ProM. |
that is exactly whats going on--i just spoke to a mustang
performance shop in my area and told me i need the larger tube replaced in my air flow meter housing--they asked if it was blue-i said no,so they said i need to replace that tube to a larger one-- what do you think? dave |
The C&L meters seem to cause a lot of problems, I replaced mine a long time ago and have never regretted it.
Pro-M sells a really nice line of 80mm meters that come with a filter. Currently they are on sale for $199 on the www.pro-flow.com website. Check out the sale page. I currently have one of the 80mm meters and I am extremely happy with it. Very driveable. I believe Wade has the same meter as well. |
Dave - I'd try to find another meter, other than C&L, to borrow and try before you spend more money. Yes, you can replace the sample tube in the C&L to change the calibration, but I don't think that'll solve your problem. If you change the calibration to 24#, then you MUST run the stock computer. If you try to run the Cobra computer w/ the 24# calibration tube, it'll be even leaner than it already is.
19# calibrated meter = use the cobra computer 24# calibrated meter = use the stock computer Like Mike said, the ProM 80mm meter is awesome. That's what I run now, after fighting with two different C&L meters for 2 months. $199 is a great price....I paid $325 a couple years ago. If you do go w/ a new meter, get it calibrated for 24# injectors and go back to the stock computer. It'll make more power than the Cobra computer. |
Quote:
dave |
yup. They'll ask you a bunch of questions when you order, and it comes calibrated. Plug it in and go. If you ever swap in bigger injectors, you can send it back and get it recalibrated.
|
i have had the pro-m air flow meter for one week--the car
drives better but still does not idle correctly. when started cold-the idle goes up and down.i have to keep my foot on the gas to keep it from stalling.after i drive the car and come to a stop the car idles fine.i have spoken to everyone that works there still waiting for a answer what do you think? |
Set up TPS
Hi,
That is a typical symptom of the throttle position sensor. Get a digital voltmeter and connect to the black and orange[green on some years]wires, turn key on,engine off. meter should read DC volts. 0.997 is optimal setting, yours probably reads 0.8xx something. loosen the 2 black screws and try and move the sensor to give that voltage reading. If not enough adjustment,then take it off and use a small round file or drill bit and make the holes 'slightly' bigger and try again for 0.997 volts, don't adjust over 1 volt. If the idle still varies ,the carbon in the sensor is breaking down, get a new sensor. Perry.:cool: |
i see what you are saying about the throttle sensor,and i checked
the readings which come up normal,what i do not understand is when the car is warm and i get it to idle normally its great. i shut the car off and then restart it and it will not idle unless i use my foot to stablize the idle? |
KMP (KEEP ME POSTED) :D
|
Quote:
|
I HAVE TO SAME PROBLEM. STARTS EASY BUT I HAVE TO USE THE PEDAL TO KEEP IT IDLING UNTILL IT WARMS UP. I HAVE A PRO FLOW MASS AIR CALIBRATED FOR THE 24 LB INJECTORS. STOCK COMPUTER FROM A 89 AUTO MUSTANG. O2 ARE NEW AND ARE LOCATED 14" FROM THE HEADS. I CHECKED THE TPS. LAST WEEK I LOWER THE FUEL PRESSURE TO 40 LBS BUT THE EXHAUST BURNED OUR EYE. WE HAD TO LEAVE THE SHOP.
HOW DO I ENRICH THE FUEL MIXTURE? I CLEANED THE TPS, BUT HOW DO I KNOW IF I NEED A NEW ONE? |
Quote:
the mass air when cold while running and if the idle stops fluctuating the mass air will need to be recalibrated-if it continues then there is something else wrong. i will try that--what do you think,adding ground wires has helped out alot |
COME ON GUYS, I NEED HELP!
|
Quote:
battery to your computer--i did and the car runs alot better but still does not idle properly when cold dave |
MY COMPUTER IS GROUNDED. I BORROWED COACH MIKE'S 92 COMPUTER. FRIDAY I WILL SWAP THEM OUT AND SEE WHAT HAPPENS.
|
| All times are GMT -7. The time now is 06:38 PM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: