ebpv?
Thread Starter
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Freshman User
Joined: Mar 2009
Posts: 36
Likes: 0
No , have not checked fuel pressure. no cel. its as if the ebpv is actvated, but its not. once the truck is completely warmed up it will drive and shift fine up to 30mph, then bam, feels like a damper closed. will not go over 30, will just spew black smoke if I hold the pedal down.
Thread Starter
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Freshman User
Joined: Mar 2009
Posts: 36
Likes: 0
yes MADVAN, feels like tc lock. but this would only happen when the temp wasn't up, now, I could drive my truck for miles everything feels fine until 30mph, then it fells like I downshifted into 1st gear, its an automatic, even if I kept the pedal down, it would just spew black smoke. before this would happen, I could come to a complete stop, then take off again and everything would be fine once the temps were up, now no matter what the temp is, she wont kick in after 30. I'm trying, no mech, just a plumber.
Lead Driver
Joined: May 2007
Posts: 8,606
Likes: 13
From: Belair md
ok 2 things, "spews black smoke" and "bone stock" dont go together.
my money is on a clogged cat or a faulty map or baro sensor. there are only a few things that can cause spews of black smoke along with no power on a stock tuning truck. without a scan tool it is a little more difficult to diag but a simple test is unplug your map sensor and drive it. you will get a cel but test drive to look for a change in performance.
map sensor i slocated in the top left of this picture right on top of the heater housing, 3 wire connector with a rubber hose that goes right to your intake.
my money is on a clogged cat or a faulty map or baro sensor. there are only a few things that can cause spews of black smoke along with no power on a stock tuning truck. without a scan tool it is a little more difficult to diag but a simple test is unplug your map sensor and drive it. you will get a cel but test drive to look for a change in performance.
map sensor i slocated in the top left of this picture right on top of the heater housing, 3 wire connector with a rubber hose that goes right to your intake.
Lead Driver
Joined: May 2007
Posts: 8,606
Likes: 13
From: Belair md
z06man, if you really are here to try and fix your truck then pm me your phone number. i will walk you through some easy diag on your truck but i need some cooperation on your part and a history on your "replaced parts list" its a bit late tonight but i will be home tomarrow for a while. i am willing to donate my time to try and help you. the ball is in your court
Hotshot
Joined: Oct 2003
Posts: 17,791
Likes: 99
From: Ashland City, TN
Man, just a giveup. Prolly something simple as a sensor too.
Ebpv even if unpluged can close.
Sensors coon suggested are all good starts.
Ebpv even if unpluged can close.
Sensors coon suggested are all good starts.
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Hotshot
Joined: Jul 2008
Posts: 11,231
Likes: 130
From: Thomasville, GA
Pull the downpipe off to see if the EBPV is indeed closed or open, even if unplugged it can close and might need to be wired open.
Check the VSS (Vehicle Speed Sensor) on top of the rear diff. Pull it out and if it's dirty wipe it off with a clean rag and reinstall. Or put in a new one. Also check the wires going to it for damage.
Transmission Range Sensor on the driver side of the tranny. Could go bad and the truck won't know what gear it's in.
Come on Talyn, I know you have better advice than that...
Check the VSS (Vehicle Speed Sensor) on top of the rear diff. Pull it out and if it's dirty wipe it off with a clean rag and reinstall. Or put in a new one. Also check the wires going to it for damage.
Transmission Range Sensor on the driver side of the tranny. Could go bad and the truck won't know what gear it's in.
Come on Talyn, I know you have better advice than that...
Posting Guru
Joined: Mar 2009
Posts: 1,799
Likes: 0
is there any possible way you can get a video for us when it starts to do it? our flatbed duraturd does that same thing but its a fuel rail issue and you can keep it to the boards and it wont go above 2grand or 30mph and the engine seems loaded up, is your engine loaded up when it happenes? im sure if we can hear what its doing, it will make this Diag process much quicker
Laughing Gas
Joined: Feb 2009
Posts: 921
Likes: 1
From: Denver CO
Did you check the FPR screen if its plugged up enough itll bog the power down and cause smoke, That and plugged up CAT will cause lots of smoke with no power. Also Good idea wiring the EBPV open to ensure it.