86 2.9 starting problem
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86 2.9 starting problem
Well i'm back again for some more help. I've discovered that if i turn my key on (i hear my relays and pumps run for a second and then shut off) then i turn my distributor all the way to the left or the right, my pumps will run for a second like when i turn the key on. It might start right up and it might not. I do this till it starts and it runs fine. Till i shut it off. Has anyone had any experiance with something like this? Thanks JD.
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From: UT
Don't know the specifics, but basically the computer runs the fuel pump 1) When the key is turned on and 2) when it sees the CID or PIP signal generated in the distributor (and transferrred to the EEC-IV computer by the TFI-IV ignition module).
Gut feel: Where letting the pumps run more than once before starting to run the engine seems to help, I would suspect that it is taking longer than just a second or two for the fuel pressure in the rail to come up. I think the first thing I would do with your truck is put a fuel pressure gauge on the fuel rail and see how long it takes for the fuel pressure to come up and see how well the fuel rail holds pressure. Ken00 has posted a fairly detailed write-up in the tech info thread on testing fuel pressure.
Gut feel: Where letting the pumps run more than once before starting to run the engine seems to help, I would suspect that it is taking longer than just a second or two for the fuel pressure in the rail to come up. I think the first thing I would do with your truck is put a fuel pressure gauge on the fuel rail and see how long it takes for the fuel pressure to come up and see how well the fuel rail holds pressure. Ken00 has posted a fairly detailed write-up in the tech info thread on testing fuel pressure.
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Your probley right, but i've had a lot of trouble with it starting. It had gotten harder and harder to start then would not run. Noticed i did'nt get spayed with fuel when i would push the valve on the fuel rail in. So replaced filter, both pumps and plugs. I had run the pumps by tripping the relay and that did'nt help. Then i turned the dist. as discribed above, and she started. I have had to do that maybe 5 times out of the last 8 starts. The alt. quit on me this morning, replaced it and it has started three times since then, Could that have been my problem somehow?
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