Q: Was told I needed to replace the catalyst converter, now car won't start at all help? ??

asked by on February 01, 2016

We had it towed to a guy that did work on it before for us with the new catalyst converter in box brand new. He said he cut into the pipe in front of the catalyst converter an it was still making the pipe red hot... Next thing I know the car won't start so they replaced the starter, an spark plugs. The car still won't start they have had it over a week so I said at this point I'm done bring it back. Supposed to be towed back today... anyone have any ideas on what to do next? ??
My car has 150000 miles.
My car has an automatic transmission.

The engine may be having an issue with the crankshaft sensor and crankshaft damper. The sensor may be the reason of the no start. The crankshaft damper is known to come apart and could damage the sensor behind it. I recommend you have your engine checked for proper spark and fuel pressure. If you lost spark then the crank sensor may be the cause. If you lost fuel pressure then the fuel pump and filter may be bad. The reason the pipes turn red hot is because of two possible things that can cause it. The catalyst converter is clogged or the engine is getting too much fuel and what the engine cannot burn ignites in the exhaust and turns the pipe red hot. The exhaust can be checked by disconnecting the pipe and see if the engine starts. The fuel pressure too high can cause the excessive fuel in engine. The best recommendation is to have a certified mechanic like one from YourMechanic come and diagnose why your car will not start.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Speedometer not working correctly

Your assumption sounds about right, either the sensor and or the cable are sending some mixed signals to the dash and it doesn't know what to do with it. Have a certified mechanic take a look at your speedometer components...

Can a bad muffler cause a smog test to fail?

Hello. You need to see why the last smog failure was for. If the failure was excessive O2 in the exhaust test, then it could be the muffler. If it is for high HC or CO then it may be...

3 part question. I have a 1994 chrysler lhs thats had the timing belt go out

The 3.5 ltr V6 is an interference engine. That means the valves and the pistons occupy the same space but at different times. The timing belt keeps the cams and crankshaft spinning in the proper time, so the valves and...

Related articles

A Buyer’s Guide to the 2012 Buick LaCrosse eAssist
Buick Buick has entered the hybrid market in a big way with the 2012 Buick LaCrosse eAssist model. It has all of the same great looks and features that you would expect from a luxury sedan from Buick. However, the...
P0420 OBD-II Trouble Code: Catalyst System Efficiency Below Threshold (Bank 1)
P0420 code means that either the upstream or downstream oxygen sensor in the catalytic converter is not working. Replacing these parts can fix P0420.
What Does a Catalytic Converter Do?
The The modern automotive exhaust system is much more advanced than what was available even just a couple of decades ago. After recognizing that the average automobile was one of the primary sources of global pollution, the US government enacted...