04 no start when hot
CF Monarch
Joined: Oct 2017
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From: USA
Most cars back then used a point and condenser ignition system and some cars would need points every couple of months, or at least to be cleaned and reset with a points gauge. My fathers old 1969 C-60 366 cubic inch V8 medium duty truck needed new points every month as it was working 5-6 days a week in lots of dust, so new air filters as well.
He made lots of $$$ for the local Chevrolet dealer that my old man bought that truck brand new truck from. Had a canister oil filter, so we used AC Delco filters only. Five speed stick with an electric two-speed axle that you could split into 10 speeds. Those were the good old days.
I'm here for the party
Joined: Feb 2019
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From: Maryland
dont get me wrong i wasnt questioning his knowledge but actually more detail, as it when it started and if its still used toady or when gm did stop or if any other manufacture used it also
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to my knowledge they all have it.
although flooding is rare with modern fuel injection...it can happen (used to see it on cold winter days when people jockey cars in the parking lot...start it cold...move it, shut it off right away, move it again, repeat and flood.
when its a cold start up its blasting a rich mixture using set programming as the 02 sensors aren't working yet....its in open loop operation so the pcm has no feedback on how rich the mixture is.
although flooding is rare with modern fuel injection...it can happen (used to see it on cold winter days when people jockey cars in the parking lot...start it cold...move it, shut it off right away, move it again, repeat and flood.
when its a cold start up its blasting a rich mixture using set programming as the 02 sensors aren't working yet....its in open loop operation so the pcm has no feedback on how rich the mixture is.
Last edited by tech2; Apr 1, 2019 at 6:20 PM.
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Joined: Mar 2019
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I finally got around to fixing this issue. I didnt need to drive the van for a few weeks. I decided to replace the fuel pump. I thought it was a vapor lock and the check valve in the pump could be faulty. The fuel gauge was not acting right and it does have 246,000 miles in the van so I can justify $225 on a pump. I am the service manager for a garbage hauling company so i took it to work and put the van up on the lift, an hour later i had it in and engine running. I have driven for over a week and it start everytime now, the fule gauge is acting as it should and runs down the road great. I truly think the check valve in the pump was not allowing gas to return to tank and vaporizing. Just thought i would pass this along. I also replace the fuel filter while i had it in the air.
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Joined: Mar 2023
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2004 chevy venture van flooding when sets for <30 min
I finally got around to fixing this issue. I didnt need to drive the van for a few weeks. I decided to replace the fuel pump. I thought it was a vapor lock and the check valve in the pump could be faulty. The fuel gauge was not acting right and it does have 246,000 miles in the van so I can justify $225 on a pump. I am the service manager for a garbage hauling company so i took it to work and put the van up on the lift, an hour later i had it in and engine running. I have driven for over a week and it start everytime now, the fule gauge is acting as it should and runs down the road great. I truly think the check valve in the pump was not allowing gas to return to tank and vaporizing. Just thought i would pass this along. I also replace the fuel filter while i had it in the air.
Last edited by stanjacobs; Mar 31, 2023 at 7:20 PM.
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Joined: Jan 2020
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2004 Venture
I have searched through the many great threads on this forum for an answer. I see a few have had this but no one has responded. I have a random no start when engine is hot. I drive it to temp, go in a store for <30 and I get a crank no start condition. I I have put in a new fuel pressure regulator and that worked for about three days. A new pcv valve and tube with new grommet and hoses, that worked for a few days. I found a damaged (not completely broken) whit wire on my TPS I replaced the connector to that and again for about 2 days no problems. I cleaned all fuel management sensors and connectors and no change there. I connected my scan tool and no issues found. Could this be a vapor lock situation? Will replacing fuel pump help this? I will check to see if spark is present the next time it wont start.. Will an cam or crank sensor go bad with out throwing a code?
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