Hi Blazer Forum

I have a 2000 Blazer ZR 1 it recently had both CAT'S fail and replaced. I have been getting error codes - 0172, 0175 & 0300. Left & Right bank running rich & general misfire. So I ran a Leak down test on the fuel rail. and it failed badly. It jumped up to 60 PSI held for about 5 seconds and dropped to 0 quickly. So I am thinking it has to be stuck injectors or leaking hoses or regulator.

I am going too pull the injectors and pressurize the fuel system and see if I can spot the problem. A spider goes for 300+, each injector goes about 70-80 or should I clean injector and replace seals, more work but alot cheaper.


It runs good, idles rough and hard 2 start when its hot, gas mileage is about 15 to 18 highway.

Any advice will be greatly appreciated, you were all very helpful last time, will post back with results.
Thanz Shadowzone

 

I would do the MFI upgrade. Eliminate poppets and everything is brand new. I just did this on my 2000 GMC Jimmy. See the link below: