hi i have a problem with car that i have been working on for while now is getting fuel have replacedfilter, pump,fuel injectors,plugs dist cap , rotor , fuel dist , have all been replaced but still have same problem car will start but wont hit on all 4 cylinders have checked compression too its good it will run better if you spray starting fluid in it then running on pump it self im about at the end of my patiencee can anyone tell me whats wrong?

Wow, that's quite the laundry list of parts replaced.

Can you describe what the engine is like on cold and warm start up?

Once running, will it idle and at what rpm?

What's the condition of 1) OVP relay fuse; 2) pin contacts on the OVP, fuel pump relay and ECU; 3) Idle Air Control Valve; 4) vacuum lines on the intake side; 5) O2 sensor's age/last replacement; and 5) whether the A/F mixture has been monkeyed around with.

can you tell me where the ovp fuse located at?

yes it will idle if you spray starting fluid in it but still sounds like its missing

The OVP (over voltage protection) relay is located behind the battery, hidden by the plastic insulating wall. There is a fuse mounted on the top of the red plastic top. The fuel pump relaly, the HVAC relay and the ECU are back there too.

I forgot to ask, but what's the condition of the sparkplugs? Wet? Sooty? Are they different condition, indicating a problem in just one cylinder?

the plugs are extremly wet on two cylinders 2and 4 i have changed the plugs a couple of times already.

1. Did you install Bosch non-resistor spark plugs?

2. What is the age of the spark plug wires? Are they the original type Bosch with the built in resistors?

3. Did you use a spark plug wire puller when removing the spark plug wire from the spark plug? I made one out of a wire coat hanger bent in a U shape with loops on the end to grab the side tabs of the connector so I wouldn't pull on the wire.

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

[quote=slk230red;1979781]1. Did you install Bosch non-resistor spark plugs?

2. What is the age of the spark plug wires? Are they the original type Bosch with the built in resistors?

3. Did you use a spark plug wire puller when removing the spark plug wire from the spark plug? I made one out of a wire coat hanger bent in a U shape with loops on the end to grab the side tabs of the connector so I wouldn't pull on the wire.[/quote

have changed plugs and wires plugs are not bosch not sure about non resisiter
have also changed fuel pump and filter but not sure about the pump pressure doesn't act like it has as much to me.