Hi all,

After carrying out the removal of my Secondary Air Injection Pump, bypassing of the N112 and N249 valves and the fitting of a Oil Catch Can the engine mangement light came on and the following fault code was registered 17705 - Pressure Drop between Turbo and Throttle Valve (check D.V.!) :(

I decided to purchase the following http://www.turboboostleaktesters.com/servlet/the-120/INTAKE-PIPE-KIT--dsh-/Detail which I must say, was delivered within 4-5 days with tracking from the USA .

The tester arrived and after connecting it all up I started spraying soapy water around all the breather pipes, vac lines, turbo pipes etc, once the test is started any air leaking from the system will create bubbles from the efected areas.

Apart from a few clips that needed tightening on my vac lines the main leak was coming from the suction jet pump 058133753B located underneath the Intake manifold, I purchased a replacement part for around £30 fom TPS and since fitting I have noticed an improvement in boosting, MPG and the overall feel of the car.

The one thing left for me to rectify is, on start up the engine ticks over at 1200rpm for approx 90 secs and then drops down to normal revs.

I know this is common on these models but I was hoping after the removal of the Secondary Air Pump this would have stopped. Any ideas?

try a tuner. as far as the ECU is concerned I would say its programmed to do it so talk to a tuner and they should sort it.

How much was the kit in total after postage n tax n that.

PM might be better

Not much of an idea what you have done, but perhaps the initial cold start-up could/may have something to do with fuel/ air ratio mixture??

It's programmed into the ECU for the warm-up procedure, so you've got 3 things happening at once for the first 90 seconds

1. The variable valve controller opens the valves for slightly longer

2. Revs are held at 200-300 rpm above normal idle

3. Secondary air system pumps fresh air into the exhaust system

If you've removed your S.A.I. pump then step 3 won't be happening any more but I would think the ECU would have to be re-programmed to stop steps 1 & 2 happening.

I'm not sure you'd want to stop it happening anyway as then your exhaust system isn't getting a proper warm up. It affects the emmissions but as they usually run the car hot for a while before an emissions test at MOT it probably wouldn't fail that.

might bugger up the Cat tho?

doesnt it run like that to basically make the engine hot sooner?

the car doesnt run right when cold and is at optimum performance and such like when up to temp, thats why the cooling system is isoplated till the oil adn engine get to a certain temp then the cooling system is on to maintain the temps.

I wouldnt bother changing it, just leave it as its only 90 seconds

It sounds like I either need to get it re-mapped to remove the pump fully or leave it as it is.

Think I will leave it as it is :-)

The kit was less than £30 delivered and I had no tax to pay, I believe it was marked as a "letter" so that might be the reason for not paying tax.

Excellent bit of kit to have, as it saved alot of time and money :-)

cheers mate, might have to get me one of them lol

when you remove the SAI you just need to get the fault/feature mapped out. Talk to Ben at Shark and he will give you the low down

I did the replacement of the suction jet pump as well and got an extra 5PSI's back I also put extra check valves into the crank breather setup to stop boost leaking into the crank case (from the small line under the manifold next to the Jet pump one. I now get 20 peak and 18 dropping to 14 as the revs go toward the red line. on the Vac side I get 25 at idle once the SAI stops and the AC off, solid 30 on the overrun.