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shakes when accelerate/reverse

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Old 08-04-2011, 04:23 PM
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Default shakes when accelerate/reverse

problem.....
started my truck, put in reverse to back out of driveway, and when i pushed the pedal to give it some gas, the truck started to shake, like (in a front to back motion).... wtf??? does it in drive too.. too scared to drive it now.. and i have to take my girlfriend home and i have to go to practice. help!

EDIT: i also don't have all the power im supposed to..
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Last edited by tatitup8; 08-05-2011 at 11:58 AM.. Reason: erase
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Old 08-04-2011, 04:34 PM
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Last edited by tatitup8; 08-05-2011 at 11:59 AM.. Reason: remove
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Old 08-04-2011, 04:59 PM
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Jus drove around block, when not accelerating oil pressure is fine, when accelerating the pressure goes up. ??
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Old 08-04-2011, 05:25 PM
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Its normal for your oil pressure to go up when you accelerate.
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Old 08-04-2011, 05:30 PM
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Drastically and drops when I let off the pedal?
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Old 08-04-2011, 06:10 PM
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3 people said its prolly the transmission
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Old 08-04-2011, 06:22 PM
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How drastically do the RPM's rev when you push it?

A general rule of thumb is 10psi oil pressure for every 1000RPMs. That isn't an exact figure, so don't go quoting it as scripture, but the oil pump is driven by the camshaft, so the faster then engine goes, that faster the oil pump pushes oil. Are you traveling outside of the normal range of the oil pressure on your dash gauge? If it's in the normal range, don't go looking for a problem that isn't there.

Your transmission could be taking a dump, but you could have other issues like torque converter drain back, or a loose band that needs adjusting. I believe 1st and reverse are controlled by the same transmission band.
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Old 08-05-2011, 12:01 PM
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Quote:
Originally Posted by aim4squirrels View Post
How drastically do the RPM's rev when you push it?

A general rule of thumb is 10psi oil pressure for every 1000RPMs. That isn't an exact figure, so don't go quoting it as scripture, but the oil pump is driven by the camshaft, so the faster then engine goes, that faster the oil pump pushes oil. Are you traveling outside of the normal range of the oil pressure on your dash gauge? If it's in the normal range, don't go looking for a problem that isn't there.

Your transmission could be taking a dump, but you could have other issues like torque converter drain back, or a loose band that needs adjusting. I believe 1st and reverse are controlled by the same transmission band.
ok, oil thing is fine.. i tuned truck to 93 octane the day before this started happening.. i had full tank of supreme (93) so i dont think this is the problem..

it also shakes when i change to 2nd gear or downshift from second. and shakes pretty bad when i push the pedal in to about idle speed
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Old 08-05-2011, 12:42 PM
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Did you happen to do any engine work?


If you did, Check the easy stuff like plug wires firmly on contacts and on the correct tower on the cap.
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Old 08-05-2011, 01:44 PM
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I did the plenum about a month ago, changes plugs wires and tstat.
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Old 08-05-2011, 02:14 PM
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So there is nothing you did right before it started acting up?
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Old 08-05-2011, 02:34 PM
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Closest thing was tune with SCT and fill up with premium the day before
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Old 08-05-2011, 03:40 PM
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I would try going back to stock computer settings see if it helps might be that simple.
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Old 08-05-2011, 03:52 PM
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How empty were you when you filled up with the 93 octane and reprogrammed?




I know the SCT tuner removes torque management so that the trans shifts harder instead of that sloppy soft shift that Dodge gives you. It basically gimps the engine just before shift so that the torque is backed way off during the trans shift. This gives you that nice grandma feeling shift.

Perhaps there really isn't something up to snuff in your trans and the removal of the Torque Management is causing a problem.
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Old 08-05-2011, 04:01 PM
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Quote:
Originally Posted by malrick View Post
I would try going back to stock computer settings see if it helps might be that simple.
I did put it back to stock, that was first thing I tried.
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Old 08-05-2011, 04:03 PM
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Quote:
Originally Posted by aim4squirrels View Post
How empty were you when you filled up with the 93 octane and reprogrammed?




I know the SCT tuner removes torque management so that the trans shifts harder instead of that sloppy soft shift that Dodge gives you. It basically gimps the engine just before shift so that the torque is backed way off during the trans shift. This gives you that nice grandma feeling shift.

Perhaps there really isn't something up to snuff in your trans and the removal of the Torque Management is causing a problem.
I was just under a quarter tank when I filled up. And Idk if it is the tuner cuz I put it back on stock and it's doing to same thing.
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Old 08-05-2011, 07:41 PM
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how is the engine running? If you are down on power... when's the last time you did a tuneup? Does the truck run ok when cold, and get worse as it warms up?
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Old 08-05-2011, 11:04 PM
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Lol, I feel like an idiot.. I looked under the hood just snooping around, and I saw a spark plug wire fell out of the harness and it was laying on the header. It looked burned through the rubber surround to the wire and it was grounding out to the header I guess.
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Old 08-05-2011, 11:57 PM
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That would definitely give you a miss......
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Old 08-06-2011, 12:24 AM
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Hahaha yeah.. I checked plugs and wires, to see if they were plugged in, not to see if they were melted on a heAder lollll
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Old 08-06-2011, 12:24 AM
 
 
 
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