Not starting after replacing the catalytic converter system with straight pipe?

2005 FORD EXPLORER
249,000 MILES • 4.6L • V8 • 4WD • AUTOMATIC
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SELROX64
  • MEMBER
  • 1 POST
After having a completely clogged catalytic converter system I had to cut out 3 converters and replace them with straight pipe for now until I get money together to have new converters installed. Now the car won't start. It turns over but won't run. CO2 sensors are still in place. I did have to unbolt the two flanges off the exhaust manifolds to get the two front converters off (cut them outside the vehicle, connect straight pipe and hooked them up again).
Any ideas will be appreciated.
Thanks.
Mar 21, 2023 at 5:41 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

In most cases, either the ignition spark is lost or there is a fuel-related issue. Now, I don't know how long the vehicle was driven with plugged converters or how plugged they were, so I have to start with a couple of simple tests.

First, see if it starts with starting fluid, if it does and then stalls, we have a fuel-related issue. If there is no change, I need you to check for spark to the plugs.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what you find.

Take care,

Joe
Mar 21, 2023 at 8:02 PM
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