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A whole lot of shaking going on.

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A whole lot of shaking going on.
#1
kwinzee Avatar
kwinzee Ron Weber
The Hammer, ON, Canada   CAN
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1972 MG MGB GT V6 Conversion "Pumpkin"
2008 Chevrolet TrailBlazer
I have this severe shake at about 1,000 RPM. Cannot figure out what it is. The whole car shakes a bit through the entire rev band, but really bad at 1,000. Anyone have this problem? Anyone know of a solution?





Edited 2 time(s). Last edit at 2015-06-01 06:42 AM by kwinzee.

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Re: A whole lot of shaking going on.
#2
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1744 Gold Member Bill Guzman
CA, USA   USA
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1973 MG MGB GT "Renegade I GT"
1974 MG MGB "Renegade"
A bad module will not fire correctly and it will create an engine shake due to week firing.
If it is a new install and was not ran before, then it could be balance problem due to wrong flywheel.


It is our attitude that will determine the outcome


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Re: A whole lot of shaking going on.
#3
kwinzee Avatar
kwinzee Ron Weber
The Hammer, ON, Canada   CAN
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1972 MG MGB GT V6 Conversion "Pumpkin"
2008 Chevrolet TrailBlazer
Thanks for the response Bill. I guess I forgot to mention that it's throttle body injection. I have been driving the car thinking that maybe with driving it, it would let the ECM set itself and help to clear it up. But it has actually been getting a bit worse, at least it seems that way.

Should I try new injectors or maybe a new ECM?

I have an ALDL connector on order to check settings. I don't know how that will go, never had the opportunity to do something like that. If I can get it to talk to my tablet (it is a Bluetooth connector), I may have a ton of questions. I am very green at this stuff.

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Re: A whole lot of shaking going on.
#4
260mgb Jim Nichols
Sequim,WA, USA   USA
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Ron, if your 700R4 is pre 88 you may have a flexplate that is external balance. 88 and newer are neutral balance. I had a Pontiac once where the torque converter bolts loosened up also.

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Re: A whole lot of shaking going on.
#5
2manycars r n
dc, CA, USA   USA
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Like this??smiling smiley

https://www.facebook.com/photo.php?v=10202576675049432

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Re: A whole lot of shaking going on.
#6
kwinzee Avatar
kwinzee Ron Weber
The Hammer, ON, Canada   CAN
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1972 MG MGB GT V6 Conversion "Pumpkin"
2008 Chevrolet TrailBlazer
Thanks Jim, it is an 87, so I'll have to do some investigating. What do you think, should I get a flex plate from a newer car? Would that work?

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Re: A whole lot of shaking going on.
#7
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BMC Gold Member Brian Mc Cullough
Minneapolis, Minnesota, USA   USA
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1959 Austin A40 Farina
1959 Austin-Healey Bugeye Sprite
1959 Morris Minor 1000 Pickup
1961 Austin-Healey Sprite "Green Sprite"    & more
Start by pulling the spark plug wires one at a time and run the car. As you reconnect the wire, if the engine does not pick up in speed, question the ignition system and the guy who hooked up the plugs to the firing order. I have seen every-other wire on right and the other three wrong. This can cause a smooth but shake engine and also a perfectly smooth engine.

-BMC.


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Re: A whole lot of shaking going on.
#8
kwinzee Avatar
kwinzee Ron Weber
The Hammer, ON, Canada   CAN
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1972 MG MGB GT V6 Conversion "Pumpkin"
2008 Chevrolet TrailBlazer
Well Brian, then I'll have to question myself, lol. As far as I've read and been told, the firing order for my 2.8L is 1,2,3,4,5,6. The engine seems to run very well and has plenty of power, so I'd be surprised if it wasn't that. But, I will check it out because you're a hell of a lot more knowledgeable about these things than I am. Thanks.

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Re: A whole lot of shaking going on.
#9
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BMC Gold Member Brian Mc Cullough
Minneapolis, Minnesota, USA   USA
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1959 Austin A40 Farina
1959 Austin-Healey Bugeye Sprite
1959 Morris Minor 1000 Pickup
1961 Austin-Healey Sprite "Green Sprite"    & more
Thats right Ron. Now I have seen Fords wired up as Chevys and the other way round in the V6 world.

1 is the furthest forward cylinder which happens to be the passengers side front. 2 is the opposite side for the GM engine, 3 is behind 1 on the passengers side and so on. 6 is the drivers side rear.

The Ford 2.8L V6 is 1-2-3 down one bank and 4-5-6 down the other!! Completely different way of numbering cylinders. If Ford called their cylinders the same as GM then the Ford firing order would have been 1-2-3-4-5-6 but since it isn't, its something like 1-4-2-5-3-6 if memory serves. Bill Guzman an knows far more than I ever will about the Ford 2.8 but I think it may be a small but possible thing that people may mistake once in a while.

-BMC.


Member Services:
BMC British Automobile www.bmcautos.com
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Re: A whole lot of shaking going on.
#10
kwinzee Avatar
kwinzee Ron Weber
The Hammer, ON, Canada   CAN
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1972 MG MGB GT V6 Conversion "Pumpkin"
2008 Chevrolet TrailBlazer
Thanks Brian, mine is the GM V6, so the firing order would be correct like this?


Attachments:
firing order.gif    38 KB
firing order.gif

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Re: A whole lot of shaking going on.
#11
260mgb Jim Nichols
Sequim,WA, USA   USA
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Ron, What year is your 2.8?

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Re: A whole lot of shaking going on.
#12
BMC Avatar
BMC Gold Member Brian Mc Cullough
Minneapolis, Minnesota, USA   USA
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1959 Austin A40 Farina
1959 Austin-Healey Bugeye Sprite
1959 Morris Minor 1000 Pickup
1961 Austin-Healey Sprite "Green Sprite"    & more
That is correct. I bring up the Ford as a point of one way people can get this wrong.

-BMC.


Member Services:
BMC British Automobile www.bmcautos.com
Minnesota's only Fully Dedicated British Classic only shop providing Professional Restoration & Services & Specialty Products including- proper L.E.D. tail lights, Wiring looms and Engine and five speed Conversion Kits
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Re: A whole lot of shaking going on.
#13
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GMDad Don Nicholls
Caledonia, Southern Ontario, Canada   CAN
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1963 MG MGB
1970 MG MGB "Mellow Yellow"
Jim the motor and trans were together from a 1987 S10 which the guy had been driving so we were not thinking wrong flywheel but anything is possible..The trans was rebuilt while we had it apart. None of the trans or headers, etc are touching the body. We have gone over that a couple of times.


Don Nicholls
Ontario Canada
1970 MGB Roadster "mellow"
1940 Chev Street Rod
1965 Chev Pickup restored
1965 Chevelle Malibu original

"I get to drive them when the wife says I can"

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Re: A whole lot of shaking going on.
#14
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V8MGBV8 Carl Floyd
Kingsport, TN, USA   USA
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That is crazy. Why didn't Chevy leave #1 on the driver front like all the V8s?

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Re: A whole lot of shaking going on.
#15
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ex-tyke Graham Creswick
Chatham, ON, Canada   CAN
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1976 MG MGB
Quote: Why didn't Chevy leave #1 on the driver front like all the V8s...
...'cause they wanted to be just like Ford?grinning smiley

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