how much fuel pressure should there be, and where is it measured ? on 1994 Chevrolet S10

Runs rough, won't idle, lurches, can't go faster than 25 mph. Replaced TPS & IAC Valve........No Change....Truck is on side of the road and I don't have OBD 1....no codes....Fuel pressure ? Ignition ?

by in San Diego, CA on January 14, 2014
3 answers 2 comments
ANSWER by on January 14, 2014
CPI 55-60 psi @ schrader valve rear of engine. AND IT SHOULD HOLD PRESSURE WHEN KEY IS TURNED OFF!!! If it does not then the fuel spider is the likely suspect! Need a tow in that case. Black smoke from T-pipe?? Light on?
ANSWER by on January 14, 2014
What is the 8th digit of the VIN. If it is W fuel pressure should be 55 to 60 psi. If it is a Z fuel pressure should be 6 to 9 psi.
COMMENT by on January 14, 2014
It's a Z..So the fuel sys. should hold press when key is off...If it doesn't...Spyder is located ? SURVEY SEZ...Under INTAKE MANIFOLD ???
ANSWER by on January 14, 2014
YOU NEED AN ADAPTOR TO CK IT WHERE THE FUEL FILTER IS
COMMENT by on January 14, 2014
Are there 2 filters ? Back of eng and back by fuel tank ?