There are so many brands of scanners to choose from and I am advance DIY'ER so I am looking for some suggestions on the best scanner in the price range of $300-350, working on a 98 Chevy C1500 miss fire only when going a hill, runs great at all other times plus I want to bleed brakes with ABS. I want to graph the fuel trims verses the O2 sensors ETC.
I have an Innova 5610 which is a decent scanner in your price range and has some bi-directional capabilities.
I have the same truck except 4x4 and you don't need a scanner to bleed the brakes on this truck. I've owned my truck since new and have bled the brakes numerous times over the years.
With a skipping going up hills the first suspect is usually a secondary ignition fault ---- plugs, plug leads, distrobutor cap, coil anywhere the ignition spark can find a way to jump to ground without going accross the spark plug gap.
When the engine is pulling hard the the gas pedal is down and the throttle dosen't restrict the air going into the cylinders so the preesure inside the cylinder increases and so the spark needs more kilo volts for the spark to cross the spark plug gap. All those kilo volts will look for an easier way to ground so will try and jump to ground through the insulation on the coil or plug lead or distributor cap or the ceramic insulator on plug itself.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
I did a complete tune up "Plugs,Wires,Cap,Roter" Even changed the Ing. coil, No help
I must admit I did turn into a parts changer trying to find the issue:
MAF Sensor
MAP Sensor
Crank Angle Sensor
Throttle Position Sensor
That's what lead me to Dan's web site to find the problem the correct way.
Still attempting to solve my issue with my 1998 C1500 missing only when under a load "Uphill" I did an exhaust back pressure test and didn't see what I was expecting, I was expecting to see high back pressures but I seem to have a vacuum on the higher RPM's I did block off the EGR valve but still have the missing up the hill issue. however the EGR is reconnected on the test.
Please see the video of my test results results and please give me your feed back as to what you think.
