cable throttle conversion 3900...?

[CjLink]

http://cgi.ebay.com/ebaymotors/Cadillac ... dZViewItem

http://wot-tech.com/shop/3500/3900-vvt/ ... od_62.html


so.... how many ecu problems would i have if i attempted this conversion? the drive by wire shit annoys me to no end, it's unadjustable and even if your pedal is in the exact same spot the throttle may not be open the same as a previous time, it makes launching harder than it should be

my guess is noone has done this (did a quick search and nothing came up) and it was probably due not to the problems of putting it on, but the problems of taking the drive by wire off...

[leong6gtp]

Re: cable throttle conversion 3900...?

the one on wottec is for cars swapping the engine into an older car. i tink you ECM might not like it./

[SmartGTP]

Re: cable throttle conversion 3900...?

Can we mod the stock TB to use a cable?

In that way, we retain the servo,sensor (TPS) and cruise control. We can force the plate movement via cable.

[CjLink]

Re: cable throttle conversion 3900...?

been thinking about it for the past couple hours and i cant think of any way to do it without the ecu crying... stupid drive by wire though... imagine if it malfunctioned and just opened the throttle all the way when you're sitting there at a light...?

[determined419]

Re: cable throttle conversion 3900...?

throw it in neutral, shut off the car and and you'd be fine ......................... as long as you weren't already out in the intersection

[CjLink]

Re: cable throttle conversion 3900...?

yeah... atleast i would be sitting in nuetral, or atleast have the clutch in... all it would do to MT guys is rev at us... if you're in drive in an AT car...you're in trouble

[ragingfish]

Re: cable throttle conversion 3900...?

Can we mod the stock TB to use a cable?

In that way, we retain the servo,sensor (TPS) and cruise control. We can force the plate movement via cable.

I suspect it could be done, but as always, it all comes down to how much money it would take to MAKE the conversion.

If one COULD mod the TB for DBC, as has been said, you would then likely have to see if the ECM and/or TCM could be reprogrammed - perhaps by vector if he knows how to do it - to recognize and work with the new setup.

I don't know if there are other, perhaps older, variations of the 3900 that are cable throttle, and if there are, I don't know if you could possibly just obtain a TB and associated parts from said engine and do a direct bolt-on. If it exists, and if it can be done, though, it's always possible that could solve half your equation.

imagine if it malfunctioned and just opened the throttle all the way when you're sitting there at a light...?

Honestly, I don't know the likelihood of that happening. Certainly with a manual trans though, if it DID happen, you'd have the clutch disengaged while idling so your engine would blow, but at least you wouldn't get thrown into the intersection. Us auto trans owners, though, we'd have to be able to think and react fast enough to get it into N or turn the key off - before becoming a pontiac sandwich.

[TLS2000]

Re: cable throttle conversion 3900...?

There are no older versions of the 3900. The G6 was the first car that used it.

[ragingfish]

Re: cable throttle conversion 3900...?

There are no older versions of the 3900. The G6 was the first car that used it.

Now, IIRC, didn't someone say the 3900 is "based" off the 3400?

If so, does that mean SOME parts might be interchangeable? I know, at least, it's probably bored and stroked more, but I wonder if other areas are unchanged, such as the TB?

[TLS2000]

Re: cable throttle conversion 3900...?

It's in the 60degree v6 family, but I've never read anything by GM that says it's based on the 3400. That said, I think some of the guys who have looked at it more closely have said that it is.

I know that if they had told me that it was based on the 3400 when I was in the market, I wouldn't be driving a G6.

[SmartGTP]

Re: cable throttle conversion 3900...?

But what if we cut the servo connections so that the ECU loose control of the plate completely while the TPS still "sensing"?

We will require some ECU/TCU magic to fool the ECU so it ignores servo activation completely
Even so, I would rather prefer to have both systems. I dont like the ECU to think for me in terms of pedal position, in that case, I would be fighting the ECU via cable.

[ragingfish]

Re: cable throttle conversion 3900...?

I know that if they had told me that it was based on the 3400 when I was in the market, I wouldn't be driving a G6.

I'm not 100% sure, but I think my dad's old grand am had a 3400. If so, I don't remember anything that stood out as bad about it, but I do know from recent vehicles that have used the 3400 that it is a flop in terms of fuel economy.

[dre256]

Re: cable throttle conversion 3900...?

I dont know, that will be a project. The 3900 is an all new desing. The 05-06 3500 was based off of the 3400. The new 07+ 3500 is based off of the 3900. Thats why GM can phase out the 3900 after 3yrs because the money put into R&D is still being used in the 3500 VVT.

If you can converted, you will lose cruise control.

[ahuhn]

Re: cable throttle conversion 3900...?

throw it in neutral, shut off the car and and you'd be fine ......................... as long as you weren't already out in the intersection

they have fail safes to try to prevent that from happening. if the ECU detects problems it tends to "kill" engine power to the point it takes 5-10 seconds to get to 10 MPH

about the conversion im sure its possible anythings possible but theres got to be a TON of computer fooling that would have to happen