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maxh
User
Jun 15, 2009, 6:03 PM
Post #1 of 11
(1634 views)
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my truck
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hello my truck is giving my minor problems.it is a 1989 chevrolet 350,5.7liter. now it runs perfect it can go real fast the only problem is when im in stop and go traffic or stop at a light it will idle down and die.i was told to put carb cleaner in carb, which i did.then was told to put fuel injection cleaner in gas which i did.then today it quit more than other times,and i had to wait 15 or 20 minutes before it would crank back up.then my neighbor told my it was the control module so i changed it out then it wouldnt start at all we waited little bit maybe 45 minutes then it started up and idled pefect ,shut off recranked it,then took it down the road when i pressed the gas it acted like carb. was not getting any gas please help me out.
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Loren Champlain Sr
Veteran
/ Moderator
Jun 15, 2009, 6:12 PM
Post #2 of 11
(1631 views)
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Max; What temperature is the engine running at? These seem to have problems with running too cool, which will cause overfueling. Which, matches your symptoms. This should have a 192F or 195F thermostat, so the engine temp should be in the 195-210F range. The next time it doesn't start, check for spark at the spark plug wire. If you have spark, it's more than likely overfueling, causing a flooding condition.
Loren
SW Washington
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maxh
User
Jun 15, 2009, 6:16 PM
Post #3 of 11
(1629 views)
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Re: my truck
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the carb. is fuel injected with two jets things so could it still flood
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Loren Champlain Sr
Veteran
/ Moderator
Jun 15, 2009, 6:23 PM
Post #4 of 11
(1627 views)
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max; This is, actually, fuel injected. No carburetor. The carburetor thing you see is actually a throttle body injection system. The two 'thingys' are fuel injectors. Yes, it can flood. If it is running too cool, the computer will see that and add fuel, since there is no choke on fuel injected engines. There are other reasons it can over-fuel as well.
Loren
SW Washington
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maxh
User
Jun 15, 2009, 6:35 PM
Post #5 of 11
(1626 views)
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sorry to all im new to this truck lol thanks for imforming me please keep on and help me fix it . it runs 195 to 210 if the gauge is right.im going to put a fuel pump relay switch in it tommorrow and a new fuel filter and see if that helps
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maxh
User
Jun 15, 2009, 6:38 PM
Post #6 of 11
(1625 views)
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and if it is running to cool what can i do to fix it
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maxh
User
Jun 15, 2009, 6:58 PM
Post #7 of 11
(1621 views)
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and another thing when it idles down and starts to die and sometimes does die the oil pressure drops showing on the gauge and pops back to normal is this anything to worry about?
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maxh
User
Jun 15, 2009, 7:29 PM
Post #8 of 11
(1614 views)
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and also this truck has rebuilt egine and tranny it only has 10k miles on new motor this is a great truck just do not know how to fix this
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maxh
User
Jun 16, 2009, 4:41 AM
Post #9 of 11
(1606 views)
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ok guys today i put a new fuel filter on and a new fuel relay switch and it still will not turn over and start it is getting spark,please help me!!!!!!
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Loren Champlain Sr
Veteran
/ Moderator
Jun 16, 2009, 11:56 AM
Post #10 of 11
(1589 views)
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max; The temperature sounds fine. The oil pressure will drop as the engine idles down or, of course, dies. When you are cranking the engine, do you see the injectors squirting fuel? Do you have any way of retrieving trouble codes?
Pull out the dipstick and smell the oil. Does it smell like fuel? If it has been over-fueling, the oil could be contaminated with fuel which will also dillute it and affect lubrication. If so, it should be changed. Removing the PCV valve from the valve cover during testing may help. (leave the valve connected to the vacuum line). You may even want to pull a couple of spark plugs to see if they are wet with fuel. If they are, pull all of them and either clean them or replace them. If the injectors are over-fueling, you can disconnect the electrical connector to one of them and see if you can get it to start. Let us know how you progress. (be careful of a possible backfire through the throttle body if you have the air cleaner off while trying to start the engine).
Loren
SW Washington
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h.bonin
New User
Jun 20, 2009, 3:10 AM
Post #11 of 11
(1569 views)
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you might want to make sure that it is not vapor locking.try loosening the gas cap.
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