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Re: 87 vett loses 3 cats at same time

Subject: Re: 87 vett loses 3 cats at same time
by istter1 on 2013/9/19 5:25:08

Quote:

istter1 wrote:
Well lost 3 cats at same time.
One theory rear cat clogged first making precats fry.
Next. Vet slow start first time in morning. Excess fule in cats caused them to.melt down.
Next they were old and all failed at same time.
Tomorrow. Compression test
Fule pressure test
Injector test
Make sure the 50000volt coil is working correctly.
Already cleaned out mufflers.
Exaust sounds great now.

Anyother suggestions.

While checking lines we foung the vacume line going to the fuel pressure regulatered almost melted close.Fuel pressure varried from 40 -50 lb.
Installed tpi and would have to reve engine to keep engine running. throwing code for mass flow sensor. Sensor ok. Might not be grounding correctly because prior fire damage to wires. Will pull computer and ground. Computer from autozone a year old. Problem of pre codes could be computer will check that out Life time warrenty Autozone.

Any suggestions on Idle and mass air flow sensor.

Callaway