It has never come back and it has been over 5k miles ago.

 

After over 5k miles it has never come back since replacing the i/c pump.

 

Yea I'm thinking boost leak or the pump, either way its getting annoying! It always does it when I have it on manual and leave it on first @ around 2,000 rpm, it does not matter if the engine was cold or warmed up, but now it has just started doing it automatic mode as well. Now if put my foot down hard to accelerate, no surge what so ever, its only on the slow to moderate starts from a stop. No loss of power either. I will probably replace the intake gaskets first and go from there.

 

The only times I've suffered surging at any speed I later discovered the upper manifolds loose. Not just loose but so loose I could tighten them with my fingers. It's real easy to check and if they are real loose new gaskets are in order. Don't over tighten them though.

Les

 

Thanks Steve, looks like an I/C pump will be next then!

 

I’ve been noticing my surge while on cruise control anywhere between 65 and 80. No pattern just a random surge, no power loss, no change in drivability. Just how hard is it to replace the I/C pump?

 

I had a similar issue that was described in the beginning of the thread...

What fixed the issue for me was driving with traction control off, as was recommended by a previous post.
I only have ~8k on my Johnson Pump, and no leaks present. I.e. My issue had nothing to do with the IC pump.

So before replacing the pump I would recommend trying this free quick "fix".

-Steve

 

First thing I do when I get in the car is turn off the traction control, so that can't be it for me. I've also double checked all the intake fittings but nothing seems loose. I 'm going to try the spray bottle trick as mentioned on the service manual to check for any air leaks before replacing the pump. The car has 37K miles on the original pump and I don't have any loss of power issues, just the surge.