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fuel injection & timing

92 blazer 4.3l "w"

ok i just adjusted my timing but im not sure if i have it correct the label under the hood says 0 degrees but the little metal tab that has hash marks just says 12,8,4, Before. so i guessed put the timing a little befor the 4?....is that correct.

also "doc".....you told me where the fuel pressure regulator is by the injectors but im afraid to open up the whole "vortec" looking thing that hold everything in. where do i start there seems to be alot of bolts. etc. and is there a seal. im not afraid of big jobs i just don't want to screw it up or get in over my head with out the supplies ready.

Reply to
bmaty
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Did you unplug the EST wire prior to setting the timing? Also, your timing tab should have 12, 8, 4, 0, +2, +4, etc. to indicate before and after TDC. You want your's set to 0* BTDC (aka TDC). If you didn't unplug the EST your timing will be all off.

If you have a "W" engine, it's CPI and not TBI. The instructions I gave were for a TBI engine so for god's sake ignore them! He he he he. I would highly recommend going to Autozone, NAPA, etc. and buying a Haynes or Chiltons for your truck prior to digging into the fuel system. They run about $15 and are well worth the $$$ for first timers.

How's the oil look? Milky at all?

Doc

Reply to
"Doc"

yes like my chilton manual said i unpluggled the wire but the gauge is only marked 12,8,4 (at least as far as i can see i will try to get it cleaner tommorow) i can send a pic if it helps.

and yes i have the chilton book but it doesn''t say much about the cover of the bubble looking top thingie to get to the injectors and FPR

thanks

Reply to
bmaty

I have the 89 TBI version of your motor, and guarantee that the markings are there. Scrape the gunk, and realize that it will probably be blocked by the magnetic pickup mont tube that teh factory attached to the timing cover.

Reply to
burntkat IS AT comcast.net

great i'll get under there today......

still wondering how to go about taking apart the top of the engine to get to the injectors and stuff

bmaty

Reply to
bmaty

Just start unbolting shit and remembering where it came from! Never had a CPI apart so I'm not much help.

Doc

Reply to
"Doc"

funny thing is now its running good as compared to a few days a ago .....temp has dropped here at least 30 degress. from 50 to about 20 or less. im wondering about the temp. sensor?

iwas just doing donuts in the parking lot snow on the way home from the J-O-B and it ran great.

HHHHHHHHMMMMMMMMMMMMMMMMMMM?

bmaty

ps maybe i'll just drive my wifes jeep on the warmer days.

message

Reply to
bmaty

If it's running better when it's cold out, she's running rich. Like I said many times before, replace the 02 sensor if it's older than 5 years, 75,000 miles or if you don't know how old it is, and test the CTS as well. If you need instructions on how to test the CTS, just holler.

Doc

instructions

Reply to
"Doc"

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