Throttle problem after gov mod

[cwspellowe]

Hi fellas

Shimmed my gov this evening and now the throttle feels strange, almost off or on. The gov was shimmed approx 5mm as per londondans guide. Max fuel wound out to standard and idle screws refitted.

It starts and idles fine but throttle is more like a switch than progressive. With the engine off, I can feel the throttle stiffen up halfway with the gov. However with the engine running, there's no throttle response apart from ohmigodfullthrottle. I've moved the throttle arm to take up slack on the cable again.

Any ideas?

[strictly_perv]

You may have to adjust the shaft which bolts to the arm through the pump top, sounds like you've set it to far clock-wise. Just a thought..

[cwspellowe]

Tried that, lifted the throttle arm off and rotated the spindle as I had 2cm of travel before the pump responded. Now though there's no slack, but part throttle makes it rev it's tits off

[Ruan]

Have you adjusted the max fuel screw?

Sure you shimmed the right bit?

[cwspellowe]

Yep, shimmed the right bit. Wound the max fuel out another turn and made no difference...

[silverzx]

Gov-mod VTEC ftw.

[cwspellowe]

just wound the fuel out until it wouldn't start, then in bit by bit til it just about starts, and it's still doing it. Have i possibly seated it wrongly in the leverset?

[Ruan]

Yeah, put it back a spline, then wind in the fuel more - that's the problem

[cwspellowe]

When you say put it back a spline..?

Do you mean lift the head off, pull the gov out and reseat it? Or just lift the throttle arm and reseat it?

If the latter, rotate the throttle arm clockwise aye?

[Ruan]

Nah, just rotate the throttle arm on it's splines...

[cwspellowe]

Might be being dumb, but how will that help? It will take up the free play at the beginning of throttle travel, but it'll still rev it's tits off at the trigger point surely?

[Jackabeen]

Sorry to butt in and jack the thread abit but did you do the gov mod whilst pump was on the car ? I'm really wanting to do mine iv read all the guide and stuff a million times but it looks a lot simpler how he did it on the living room floor lol did you have to replace any seals?

[cwspellowe]

Yeah pump was on the car, only fiddly bit was unhooking the gov cradle. You have to lift the head up at the right-hand side and tilt it backwards. Bit of a pita but a bit of wiggling sorted it

[Jackabeen]

Cheers pal once the rain stops I'll be giving it a go you not have to replace any seals/gaskets?

[cwspellowe]

Nah seems to have sealed ok. Only seals loosened were the seal on the head and the one on the max fuel screw and they were both in decent nick.

[Ruan]

Might be being dumb, but how will that help? It will take up the free play at the beginning of throttle travel, but it'll still rev it's tits off at the trigger point surely?

Nah, it's because your max fuel screw is in too much at the moment to keep it running, therefore it's trying to run away, any more it'd start running away on idle, so be careful.

[cwspellowe]

It's wound all the way out Ruan. Wound it out til it wouldn't start, then in a turn so it's just about getting fuel, it's still running away at part throttle

---

In fact, just had a read of the various VE forums. Am I right in thinking that a shimmed gov under no load will have noticeably less throttle speed control at part throttle? Haven't actually driven it since I shimmed it, just part throttle under no load and the revs shoot up.

Is that normal? I have a nagging feeling now that it is...

[londondan86]

No mate thats not normal at all. You should still have a progressive throttle. When you turn the throttle shaft by hand, does it feel notchy, it should feelsmooth. for 60-70% of the way round, it will then come up atainst the gov spring which you should feel the resistance from until it is at the end of travel.
If not it sounds like it is not engaging the leverset properly.
Hope this helps

[cwspellowe]

Yeah it feels a bit notchy. Like... when you turn it half way you can feel it tighten up, then loosens up again as if it meets and then passes resistance. Should the resistance be constant after it comes up against the gov?

[mark_airey]

Sounds like something isn't right mate, it should be really smooth until you hit the gov.......

[cwspellowe]

Nopes, it feels like it catches at part travel and then behaves as if it's WOT. Was interesting moving it down the drive last night to let the other car out

Will whip the head of the pump off and try again. Reading the VE forums suggests trying to reassemble by locating the gov cradle on the leverset first, and THEN dropping the head onto it.

[londondan86]

Yea you can put the pump back together that way, just down to what different people find easier. Defo sounds like it needs to come apart though.

[Dave]

This has been shimmed on the max fuel spring yes? I shimmed the intermediate one once (so both max fuel and intermediate were effectively together) and it meant that there was no control midrange, and it responded very much how you are describing... would idle ok, but once off the idle spring revs were uncontrollable while stationary... it looked like this...

[cwspellowe]

Fark Dave, solid much?! Nah was definitely the main spring. Stripped and rebuilt the head, must have had the cradle seated wrong as it's spot on now.

[Dave]

Fark Dave, solid much?! Nah was definitely the main spring. Stripped and rebuilt the head, must have had the cradle seated wrong as it's spot on now.

Hehe I followed a guide years ago that was put up on a VW site?? Its wrong like that anyway, but still worked fine just couldnt maintain +3k~ stationary, was perfectly fine while driving though as the gov has little/no effect because the engines always under load..

[cwspellowe]

Was it vwvortex by any chance? I noticed they had a revised gov mod guide as everyone was shimming the wrong spring

[Dave]

Yeh I think it was from there...