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 ?
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1994 Chevrolet S10 Question: how much fuel pressure should there be, and where is it measured ?
Answer #1pushrod January 14, 2014, 07:48Master
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?
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.
ReplyIcky Ricky, January 14, 2014, 13:40Rookie
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 #3Greg's Orange Auto (15188 Answers) , Orange, CA - (714) 361-9386globalhelper January 14, 2014, 09:28Master
YOU NEED AN ADAPTOR TO CK IT WHERE THE FUEL FILTER IS
ReplyIcky Ricky, January 14, 2014, 13:51Rookie
Are there 2 filters ? Back of eng and back by fuel tank ?