86SS87GN said:87 GN turns over 4 to 5 seconds before starting: MSD DIS-4 w INTERFACE MODULE,NEW PLUGS,NEW WIRES,NEW COIL,NEW FUEL PUMP,NEW FILTER,NEW MINI STARTER.WHAT SENSORS MAY CAUSE THIS CONDITION? I AM LOST
86SS87GN said:....... 87 GN turns over 4 to 5 seconds before starting: MSD DIS-4 w INTERFACE MODULE,NEW PLUGS,NEW WIRES,NEW COIL,NEW FUEL PUMP,NEW FILTER,NEW MINI STARTER.WHAT SENSORS MAY CAUSE THIS CONDITION? ........
yes it started the same but had worse idleTURBOV6 said:Did you try to bypass the MSD with the jumper supplied?
Minor nit, but the oil pressure switch contacts are in parallel with the fuel pump relay contacts. That means it doesn't energize the relay when the oil pressure comes up, it creates a new path for the fuel pump current to flow besides through the relay. Sounds like either the relay, the ecm, or the wiring is bad. Don't forget that if you are triggering a fuel pump hot wire kit off the stock relay (which is how most do it), you have that relay and wiring to check as well.DonnieShort said:Fuel pump relay bad? If so the oil pressure switch is in the mix too, has to see >4psi oil pressure before it will allow relay to energize.
Like ijames said: The oil pressure switch doesn't have anything to do with the relay energizing. It's a bypass, in case the relay fails. The fuel pump will work with the oil pressure switch bypassing the relay, but it takes some cranking to build that 4psi. If you unplug the oil pressure switch and jump the terminals in the plug(crude, but effective), and the car starts faster: It's probably the relay.DonnieShort said:Fuel pump relay bad? If so the oil pressure switch is in the mix too, has to see >4psi oil pressure before it will allow relay to energize.
TURBOV6 said:Did you try to bypass the MSD with the jumper supplied?
86BGN said:Have you put a fuel pressure gauge on it to see if anything is leaking down? When it starts do you see any black smoke at all? My car was doing the same thing and it turned out to be a injector. The injector/injectors were leaking fuel into the cylinders and then the car would crank for 3-4 seconds until it cleared out and started. With the new injectors it fires right up.
Just a thought
rodman99999 said:Like ijames said: The oil pressure switch doesn't have anything to do with the relay energizing. It's a bypass, in case the relay fails. The fuel pump will work with the oil pressure switch bypassing the relay, but it takes some cranking to build that 4psi. If you unplug the oil pressure switch and jump the terminals in the plug(crude, but effective), and the car starts faster: It's probably the relay.
86SS87GN said:YES IT LEAK DOWN AND THERE IS SMOKE WHEN IT TAKES LONG TIME TO START