We had a 2000 Buick Park Avenue, 3.8l v6 Automatic, in yesterday that was giving me some problems. I was getting a code p0303, and when I went to look at misfire history Cylinder #3 had a count over 20,000. I took a test drive, and confirmed that yes the misfire was showing up mostly on Cylinder 3 of the Misfire data. Customer had already had a go at the problem himself. Had replaced coil, wires, plugs. In fact 2 weeks ago he asked us to install a Crank Sensor for him. Finally, He decided to let us make an attempt at diagnosing it for him.
It has a Strange Affectation in the spark pattern. I've never seen something like this occur. What would you guys do to continue diagnosis of this? I keep thinking to myself that this is not real, and I'm perhaps wasting my time. What do you think?
Right after I had taken my first look at it with the Pico, I went on a test drive. I went to hit the throttle and the vehicle fell on its face. It felt like lack of fuel. So when I got back to the shop I gave the Firstlook device a go. I've included a loaded ( Power Braking) waveform using a the Firstlook Device.
I'm thinking MAF or Problem in the Ignition module. I was not able to go any further. We had informed the owner of the car our thoughts and what he might be looking at money wise. He opted to stop and take the car.
Has anybody seen a pattern like the one I have of ignition?
- What is this in on Channel B.psdata
- (790.77 KiB) Downloaded 109 times