Skip the auto shop - Our mechanics make house calls

Q: Possible computer problem

asked by on

My specific circumstance stems from not correcting cel issues over a long period on my 02 Galant that I bought new and the cels began about three years after starting with misfire codes. Long story short, the 11 years from 05 till March 2016 of this neglect rendered the cat to the condition of failure which means the insides had come loose and was clogging the exhaust. I could not afford a new one so I cleaned it out and drove it for the 4 months between March and July when I obtained the new cat. I installed the new cat but foolishly just started the car (which was a normal start and run) and began to drive immediately, and the car stalled at about 150 FEET and did not restart. I believe operating the car without the cat for that long pushed the computer adjustments so far out that when the new cat was installed, driving without allowing the car to adjust while idling caused the computer to shut down. Can't afford tow and blind diagnostics so direction to proceed will be appreciated.

My car has 137000 miles.
My car has an automatic transmission.

A: Installing a new catalyst will not cause th...

Installing a new catalyst will not cause the no start. You will need to have the computer scanned and all the fuses checked. You may have damaged or shorted one of the O2 sensors wires when you did the job of the replacement. Check for spark and fuel pressure after the scan is where you have to start. Since you are looking for an alternative for towing, you may consider enlisting the help of a mobile professional, such as one from YourMechanic. They will be able to come to the site of the car to thoroughly inspect and diagnose the starting problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Should I replace or clean the catalytic converter?

Hey there. The Check Engine Light can set if the catalyst efficiency is below threshold. There will be no visible symptoms at all, or change in engine performance, because the recorded "low efficiency" can simply mean that more pollutants are...

Q: Check engine light illuminated car runs 5 mins shakes and cuts off. 2004 Chrysler Crossfire

Hey there. You most likely have one of two problems. The ignition module or fuel pump in the tank is getting hot and shutting down after the 5 minutes. First, I recommend having the computer scanned to see what...

Q: car won't start.

When a vehicle will not start it needs three things. It needs proper air/fuel mix and compression then ignition to ignite the mixture. If any one is missing or is not correct, it will not start and run. With this...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.