Author Topic: 5.0 COBRA PERFORMANCE ISSUES (Read 2754 times)

FAST JAX · « **on:** April 19, 2009, 02:32:49 PM »

MY COBRA WHEN FIRST STARTED REGAURDLESS OF OUTSIDE TEMPS FAILS ON ITS FACE WHEN MORE THAN SLIGHT ACCELERATION IS ATTEMPTED.. RUNS MUCH BETTER WHEN IT WARMS UP A LITTLE.. BUT NOT AS STRONG AGAIN WHEN IT REACHES NORMAL OPPERATING TEMPS?? HAVE REPLACED TEMP SENSOR, & MASS AIRFLOW SENSOR.. IT ACTS LIKE A CARBORATED VEHICLE WHEN THE CHOKE ISNT WORKING PROPERLY..??

Soaring · « **Reply #1 on:** April 19, 2009, 04:00:33 PM »

Have you tried cleaning the injectors yet? If not, you may want to do that. Here is a "How To."
http://www.ehow.com/how_2044858_clean-fuel-injectors.html

FAST JAX · « **Reply #2 on:** April 19, 2009, 08:39:07 PM »

No, I haven`t tried cleaning injectors yet.. I`ll look into the "how to"... another thing I forgot to mention is the car sits a lot, I dont drive it all winter, and only get it out on nice days...it also has a fluctuating idle speed after it warms up.. dont know if that"ll help you help me, but I really appreciate you trying to help & your reply... I`ve been asking friends & mechanics bout this issue for a long time & I`m just trying to fix the problem on my own without taking to dealer or something...

rmodel65 · « **Reply #3 on:** April 19, 2009, 08:54:13 PM »

probably the fuel pump, next time you start it up try priming the pump(turning the key one and off a few times) and see how it does

FAST JAX · « **Reply #4 on:** April 19, 2009, 09:19:22 PM »

One ov my friends mentioned the fuel pump also... I`ve tried "cycling the ignition" to try & raise fuel pressure, but it didn`t make a diff... It doesnt make sense (2 me anyway) that a @ approx 150 deg. (guessing) it runs like a scalded dog !!?? could it still be fuel pump?? Seems to me it`d never run really good if it was fuel pump.. I`m decent with older stuff, but new stuff with elec pumps, injectors, computers & such kinda get my head spinning...

Soaring · « **Reply #5 on:** April 20, 2009, 04:52:34 AM »

I hear ya' Jax. That's why I take my 03 Mach to a modern mechanic who is trained in all the computer crap. I have never had my 65 worked on by anybody but me, and she runs like a scalded cat. But the 65 is a simplistic machine compared to the Mach. Sometimes you just have to bite the bullet and take her to a mechanic who has all the modern testing tools and training to do the job right.