TRUCK HAS 5

1990 Chevrolet Silverado

Tiny

hamerlaner

January, 4, 2013 AT 6:33 PM

Truck has 5.7 in it I have changed dist pick- up dist modle oil pressure switch coolant senser the truck stats good but you put it in a puul and it dies it looks to be getting fuel and starts right back up

6 Answers

Tiny

JDL

January, 4, 2013 AT 7:09 PM

How long since overall tune-up? Use a gage and check fuel pressure. Are there any applicable mil codes? You can check mil codes, yourself. You use a jumper wire between the A & B terminals at the datalink connector. Turn key just till dash lites come on, no further, the mil on the dash starts flashing, you count the flashes to get the codes. Your looking for two digit codes. Let us know what you find.

Tiny

hamerlaner

January, 4, 2013 AT 7:29 PM

II failed to report new plugs wies cap rotor and fuel pump also

Tiny

hamerlaner

January, 4, 2013 AT 7:48 PM

All I get is code 12

Tiny

JDL

January, 4, 2013 AT 8:08 PM

You still need to check fuel pressure. Do a cylinder compression test. Make sure the exhaust isn't clogged.

Tiny

hamerlaner

January, 4, 2013 AT 8:29 PM

Fuel pressure 12 pds comp 130 there is one cyl. At 120 exhaust is 3 in striat pipe it's got to be something simple would mapp senser cause any of this

Tiny

JDL

January, 4, 2013 AT 9:45 PM

I don't know what else? A sensor problem should have set a code. I've seen instructors say about sensors, when in doubt, take it out, meaning unplugged it. The computer may default to a preset value, allowing the vehicle to run.

Unplugging sensors may be poor diagnostics, but?

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