2000 ssei jerking
 

Hello all again!

I am having problems with my bonneville jerking going up hills and noticed it when the boost gauge is at about 5psi when this occurs,it will start to seem like it is cutting out and the rpms bounce down and up its not racing like if the trans is slipping it is loosing power when this occurs.

I have tried the boost bypass and it only got more occuring when I did this seeing as the psi get up more quickly so I undid the boost bypass and it got better but like I said when it goes up hills and there is no down shift and the boost reaches just above 0 it will everytime start to jerk.

I know I have a bad cat but if it was the cat wouldnt it always do it or is it that the cat is pluged and then when there is boost applied there is no where for the extra air to go and causes something to make it jerk?

I thought maybe it could be the boost control solenoid or maybe it is the pressure control solenoid.

Next weekend I plan on putting on a new cat and hope this fixes the prob but was just wondering what you guys thought!

Please help!!!!!!

I seriously doubt you have a boost-related problem at all. Undo that boost bypass. It can be dangerous.

I would expect a bad cat to cause HIGH boost readings as well as high engine temps.

I suspect you have a bad wire, plug or coil. This is a typical failure with your sypmtoms. It's most apparent at cruising speed in OD going up a hill or incline, not necessarily at idle.

When was the last full tune up ?

Cat is the first thing to fix..then followed by full tune up.

I'm betting on plug wires. How many years/miles on the originals? Mine went south at about 40,000.

I agree, and in that same order. Buy a set of Napa Wires, see how it does. If that doesn't work, pull the plugs and give them a good look. If niether of those work, search here for how to check your coils.

Good luck,

Freddi

Before you just start guessing if it is the wires, wait until night time, get a spray bottle filled with water and mist up the wires while the car is running. If you see arcing, you'll know it is the plug wires for sure, if not, probably one of the coils, just check one coil at a time.

I had the same problem at 43k miles...finally got so bad it blew a code - #2 misfire. New plugs and wires did the trick. ;)

I would also put my money on the plugs and wires. ;)

Ummm, maybe in my opinion. This will work for a really bad wire, if your going to see it with a unloaded engine. Since the problem is occuring on hills, it may not show up with the car just idling. (I'm not a fan of having someone load the transmission, with another somebody standing over the bumper with a squirt bottle)

I'm a 'if it's pretty close to the maintenance window, do it first' kinda guy. If it's even close to the 40-50k range on that set of wires, and it happens not to be the cause of the problem, it was going to be next months problem, and I saved myself time in the long run. :D

Freddi,

Good point about not standing over a bumper with someone loading the transmission - I kind of assumed no one would be dumb enough to do that - but I take for granted someone would use common sense...... :flame: