Just installed FFP dogbones, car vibrates like hell...

[Vegeta]

I raised my idle speed a bit and the car got quieter. I think the stock idle speed on these cars is set too damn low. Especially the 3.1 cars.

[Grand Moff Joseph]

how do you raise the idle speed, and how can you tall what the rpm is without a tach in the car?

[19Cutlass94]

Ive had the FFP monts is for a while and i duno if it happens to everybody but when I shift from neutral to drive, the idle drops low and it sounds like the engine is going to stall but it doesnt

[Grand Moff Joseph]

my car did that before I put the new bones in anyway. When I shift into gear, the rpm drops like a rock, then comes back up again. Is that a problem too???

[Vegeta]

Have to change the idle speed in the computer with a chip. I program chips so yeah, pretty simple for me to do:P

[Grand Moff Joseph]

oh you do, eh? Could you elaborate on what these chips are/do?

[19Cutlass94]

if I got a chip from FFP, would that fix it?

[Grand Moff Joseph]

now that you mention it, how do you buy their chips? They are not listed as a product on their page...

[rudefyet]

Mr. Vegeta sells them through 60degreev6.com now

 

not sure if he's got the store operational yet or not...but check http://store.60degreev6.com

[maybe2fast]

just check the lower liquid filled mount

[juicedlumina]

I think i remember having two lowers replaced on my 3.1 long time ago. At a store theyre 50$. One they said was really a bitch to change and cost 200$. My tranny went out later and while the cradle was down they changed it for free. So 200$ at that shop your looking at prob 100$ for their "genuine" gm mount and then they charge like $80+ an hour to do it.

[Grand Moff Joseph]

sounds like going to the auto parts store and getting the parts from there, and doing it myself is the best option.

[19Cutlass94]

thats quite the hit right there to have that done

[digitaloutsider]

if I got a chip from FFP, would that fix it?

Ben doesn't make chips for 3100's.

[19Cutlass94]

that kinda stinks but I guess Ill just have to live with that idle till I can get around to fixing it........ what would you have to do to change the idle anways?

[Grand Moff Joseph]

you have to change the idle via the car's computer, which means you need a custom chip.

[digitaloutsider]

Modify the code in the ECM.

[sonyman87]

i dont know why people think thats normal. mine dosnt vibrate like that

 

sounds like the idel is a bit low. Motors will shake and shutter when the idel is set to low.

[RareGMFan]

Can't you manually raise the idle at the throttle?

[sonyman87]

Can't you manually raise the idle at the throttle?

 

Yes remove the top plate above the throttle cable coil on the throttlebody and there should be a little screw next to it. just give it a few turns while the car is running until it quits shaking. this will have different effects as the car warms up and as the outside temperature changes.

 

another way would to be adjust the IAC or makesure its working properly

[19Cutlass94]

The only time my car shakes like that is when its running at operating temp, it wont shake at all when its cold even at idle, but what effects would manually changing the idle have?

[sonyman87]

only effect would be idle itself. if you are on the gas then there is no difference.

[Grand Moff Joseph]

yeah, but I have no tach on my car, so can you hook something up to it to measure rpm?

[Stevo]

With 2 'real' jacks. You can jack up the car body with one and use the second to hold the subframe with the engine held in place with blocking (keeping it held solid in place). Remove both front wheels when its up and detach the control arms (kind of a pain in the arse). Lower the subframe after carefully detaching it...

 

I and a fella I used to go to because he had air tools, replaced a whole subframe and rack in no time at all. Thing is we of course let the frame drop because we were switching it out with 2 jacks. Now my 88' sits in the driveway with what I KNOW is a busted lower mount. dammit.

[RareGMFan]

Yes remove the top plate above the throttle cable coil on the throttlebody and there should be a little screw next to it. just give it a few turns while the car is running until it quits shaking. this will have different effects as the car warms up and as the outside temperature changes.

 

Yeah, I asked because I've done it before and was wondering why everyone was saying you'd have to get a chip just to raise the idle a tad bit. I don't care for how low most every car I've had idles, either, so I've raised them several times in the past. And I usually wait till they're up to operating temp before I do it (like after I get back from a drive, or so).