I have a 1994 oldsmobile cutlass ciera that will not start. it cranks over fine. I have spark. I changed the fuel pump, the fuel pump relay, the fuel filter, the ecm, and the mass air flow sensor. the car still will not start. I cannot hear the fuel pump kick in when i turn the key forward. I checked all the wires. If I jump the fuel pump I get fuel pressure up to the fuel rail, and if I try to start the car while the pump is being jumped the car will still not start. What else could be my problem? I am really stumped on this one.
fuel system problem on 1994 Oldsmobile Cutlass Ciera
by jakelowe_05 in New Richmond, WI on August 16, 2009
4 answers 4 comments
ANSWER by ProChevy on August 17, 2009
I know you say you have fuel up to the rail, but what kind of pressure do you have? Are you getting fire to the plugs? These cars also had alot of failures from the crank sensors.
COMMENT by jakelowe_05 on August 17, 2009
I have 40 psi of fuel pressure up to the rail when i jump the pump but it doesn't turn on when I turn the key. This means that the injectors also aren't injecting the fuel. I am trying to figure out what circuit would control both the fuel pump and the fuel injectors. I have good spark.
COMMENT by ProChevy on August 18, 2009
Circuit #239 which is a pink wire and fused on fuse #1-15 amp is ignition feed to the coils. Circuit #839 also pink fused off of fuse# 16 20 amp that comes from the ignition switch is the one to fuel pump relay,fuel pump amd oil pressure switch, and it feeds the injectors also. Hope this helps you some
COMMENT by Visitor on June 14, 2010
Jakelowe, Given this was last year but what was the problem in the end and how was the problem fixed?
ANSWER by Visitor on March 09, 2010
if that dont work chang the computer i did my car had the same problems now its like new everyone should try this. and gas gauges that dont work check ground wire to fuel pump this could mostly be the problem i know about cars.
ANSWER by Visitor on March 23, 2010
this sounds like a fuel delivery problem,you can varify this by using gumout spray into the open air system spray some directly into the intake throttle opening.If it starts and runs,for a short while.It must be fuel starved.There may be a compression problem from gasoline washed doun cylinders or fould plugs from excess fuel being injected and not fired by the plugs.This may be the problem if the engine seems to crank a bit faster than normal.
COMMENT by Visitor on March 08, 2011
what you mean by plugs
ANSWER by Myron585 on November 02, 2015
Hey what was the outcome with this olds no sending power to the pump? Im having the same issue. I was thinking it was the oil pump. Because if theres no pressure the relay wont send power to the pump. Let me know
i need to replacce the fuel system wire harness from the pump relay to the sending unit as my fuel pump won't kick on.i take wire directly from the battery to the sending unit and the pump works .w...
can you send me ohm readings for map sensor, mass air flow sensor, egr valve and whatever info needed for testing all the sensors the car has. it dies after it warms up and won't start until it coo...
how do I check fuel pump relay ...need location...there are 4 of them. car will start for only a few seconds. how do I get codes using the check engine light? I put jumper wire from A to B on AL...
replaced fuel pump two months ago and spark plugs. a couple weeks ago car started hesitating during acceleration and stalling upon stopping. yesterday "service enginge soon" light came on. any s...
Cant find the fuel system relay