Throttle body assembly on a LT5

[ZR1cliff]

While i wait for the tensioners to arrive i spent some of today reassembling the throttle body,in the first photo i glued and trimmed the gasket on the horn extension,the right hand side is done.

[pic]http://i4.photobucket.com/albums/y114/LoTu5/2005_0912tb0001.jpg[/pic]

Then i did the throttle body itself,

[pic]http://i4.photobucket.com/albums/y114/LoTu5/2005_0912tb0002.jpg[/pic]

and after assembly,i made sure to compromise with lining the outside edges and centring the insides,

[pic]http://i4.photobucket.com/albums/y114/LoTu5/2005_0912tb0004.jpg[/pic]

[te51cle]

One of the things I remember David Vizard recommending doing was smoothing the leading and trailing edges of the throttle butterflies to make them into more of an aerodynamic shape to reduce turbulence and smooth the path of the intake air. Is this still a recommended procedure for modern engines ?

[c4koh]

Cliff,

Looks nice - I presume that throttle body has been polished off a bit, it looks quite smooth in there...

I was also suprised that the little butterfly is off centre - I always thought it was in the centre of the two secondary butterflies, but it seems slightly off...

Looks good though - I'm enjoying the pix!

[Gixer]

I now have the fly lead that you need in order to position the tps in the correct position.

[Gixer]

I now have the fly lead that you need in order to position the tps in the correct position.

[c5ragtop]

It's no good saying it twice - I still haven't the faintest idea what you're talking about.

[anonymous-user]

Say it louder - it's bound to sink in eventually.

[chevy-stu]

Slower and gesturing helps too !!

[ZR1cliff]

c5ragtop said:

It's no good saying it twice - I still haven't the faintest idea what you're talking about.

Nor have i ,whats a tps?

[ZR1cliff]

Ah could it be a 'Throttle position sensor'??

[franv8]

Yes it is - should be a section in your workshop manual about how to set it's position. You'll need a voltmeter and the TPS plugged into the ecm.

Fly lead Brett is talking about allows you to connect both the voltmeter and the ecm to the tps (throttle position sensor)simultaneousely. Personally I've always used the probes on the voltmeter and poked them in with the wires on the back of the plug.

Richard - for your slightly less technical brain, the tps is the little black thing next to the throttle body that has the colourful wirey thingeys leading to it. For those of us with cable operated throttles (C5's are 'drive by wire' and no doubt have a different approach to the tps)

[ZR1cliff]

franv8 said:

Yes it is - should be a section in your workshop manual about how to set it's position. You'll need a voltmeter and the TPS plugged into the ecm. Fly lead Brett is talking about allows you to connect both the voltmeter and the ecm to the tps (throttle position sensor)simultaneousely. Personally I've always used the probes on the voltmeter and poked them in with the wires on the back of the plug. Richard - for your slightly less technical brain, the tps is the little black thing next to the throttle body that has the colourful wirey thingeys leading to it. For those of us with cable operated throttles (C5's are 'drive by wire' and no doubt have a different approach to the tps)

Thanks for explaining that Fran.

[Gixer]

Bck of the wire block an LT5/1 harness is sealed hence the need for either the lead or to spike through the insulation with the probes

[c5ragtop]

franv8 said:

Richard - for your slightly less technical brain, the tps is the little black thing next to the throttle body that has the colourful wirey thingeys leading to it. For those of us with cable operated throttles (C5's are 'drive by wire' and no doubt have a different approach to the tps)

Glad you clarified that Fran. Not sure why you need a sensor to tell your what position the throttle is at. I can tell from the angle of my right foot relative to my right leg.

[ZR1cliff]

Brett is it ok to borrow it when needed?

[chevy-stu]

Just out of curiosity, do any of you chaps find yourself replacing the TPS often. On my IROC I remember having to replace the TPS about 3 times in the 7 or so years and 60k miles i had it for..

>> Edited by chevy-stu on Wednesday 14th September 11:21

[ZR1cliff]

Ive not had any or heard of any problems with the TPS on our vettes.

[chevy-stu]

Oh well, just curious. I presumed it was just my bad luck at the time, the same way as i went through 3 sets of front brake dics in the same period.

[ZR1cliff]

chevy-stu said:

Oh well, just curious. I presumed it was just my bad luck at the time, the same way as i went through 3 sets of front brake dics in the same period.

Thats not too bad for brake pads,is it?

[chevy-stu]

probably about 8 sets of pads ! + 3 sets discs !!!