Blinking engine light

[Jessaruley]

My engine light has been on for a while and the Blazer is running really hard, stalling, bad gas mileage & smell, no power up hills, surges and black soot looking stuff on the ground after we let it warm up.
I to took it in and go the codes on it.

P113 Insufficient switching
P300 Random Cyl. Misfire detected
PO401 Insufficient EGR flow detected
PO172 fuel system too rich bank

These codes might not be correct, there were 2 others but I could not read his writing. He thought that by cleaning the EGR that would fix it because they were all linked together.

I took it in in Jan 04 and had all of this replaced on it:
Cap rotor
Spark plugs & wires
Fuel filter
PVC valve
U-Joint
Wiper contron circuit board
O2 sensor

After I had it worked on it ran like a gem till about a month ago when the light came on and started blinking, then shortly after it started running rough. We put high octane gas & fuel injector cleaner in it several times and it helps but still rough. Should it be running like this if I just had it worked on? And is he correct that cleaning the EGR will fix it?

Any suggestions would be greatly appreciated.
Thanks Jessica

[ad6kb]

The onboard computer monitors a lot of thing going on, from engine operating temp to fuel pressure. When it is blinking, it is serious. Get thee to a Chevy dealer

[Fireplug]

Make model year engine???
That work was done almost a YEAR ago.
Blinking light is BAD REAL BAD you are doing emission parts damage

[Jessaruley]

Originally Posted by Fireplug

Make model year engine???
That work was done almost a YEAR ago.
Blinking light is BAD REAL BAD you are doing emission parts damage

It is a 95 Chevy Blazer I am not sure about the engine. The light was only blinking when it idles but today it started blinking when I started down the road. I have an appointment to put it in the shop Tues. the 28th. Can I drive it blinking? It is our only vehicle and we have to drive a 60 mile round trip to work.

[Fireplug]

If it was mine I would not drive it to much. A blinking check engine lite means unburnt fuel is going into the cat convertor and that will burn it out fast.

[BlazerLT]

A.) Sounds like the injector or internal nut kit is leaking. Bank PO172 fuel system too rich bank leads me to believe the nut kit has sprung a leak.

b.) IAT Sensor is defective P0113 is for a bad IAT sensor.

c.) EGR Vlave is defective and is not opening up.

[Turbocpe]

Fireplug is right, a flash service engine soon light on an OBD-II vehicle is generally a misfire condition, which will lead to unburt fuel entering the cat and can melt the insides of the cat to the point it could restrict exhaust flow.

[BlazerLT]

True, but a cat is not causing all of this.

Something is creating this problem and I think it is the CPI and nut kit.

[metallica21156]

EGR could be pluged again or stuck open.

[ricksza]

The light is blinking because the catalytic converter is in danger. Driving the vehicle could melt, destroy the convertor (very expensive).

[Mushroom777]

a chick driving a blazer .....anything more sexy?

[BlazerLT]

Originally Posted by metallica21156

EGR could be pluged again or stuck open.

Could be, but depends on if the EGR code is set.

[BlazerLT]

Originally Posted by ricksza

The light is blinking because the catalytic converter is in danger. Driving the vehicle could melt, destroy the convertor (very expensive).

Please don't say stuff like that, since when does a blicking check engine light mean a cat failure.

[ricksza]

quote from Owner's Manual: "Light Flashing -- A misfire condition has been detected. A misfire increases vehicle emissions and may damage the emission control system on your vehicle. Diagnosis and service may be required"

[metallica21156]

yes a code could be set. try to see what codes are bveing set if you can. you might have to get it towed if you can't read them at your house. i would never drive the truck if the light was blinking. also feel the part of the manifold thats right next to the block. when its cold let it idle for about a minute and then turn the truck off and feel all 6. if they all feel about the same temp then your EGR could be bad. if a port or 2 is cold then start tricing to see if you have spark and you might have gotten a weak plug. and yes that can happen.