Replacing the Rear Shocks

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The following pdf document provides step-by-step documentation on replacing the rear shocks on a 2007 Honda Accord.

rear-shock-replacement.pdf

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P1157, P0134 and LAF (Wideband O2) Sensor Replacement

 

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The following PDF shows the procedure for replacing the upstream wideband O2 sensor (technically, the LAF, or Lean Air Fuel sensor).

p1157-and-p0134-laf-wideband-o2-sensor-replacement.pdf

Ignition Coil Waveforms

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The ignition coil current waveforms can be monitored using a relatively inexpensive scope and current clamp. This technique can be used to diagnose problems with individual coils as well as some spark plug problems. The following PDF shows known-good ignition coil current waveforms as well as what they look like under a few fault conditions (ignition coil open and ignition coil short).

ignition-coil-waveforms.pdf

Fuel Pump – Current Waveform

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The health of the fuel pump and its operating speed (RPMs) can be rapidly assessed by a quick look of its current waveform. The shape of the current waveform, pump speed and average current draw are good parameters by which to diagnose a failing fuel pump.  Details of the procedure and known good fuel pump waveforms are contained in the following PDF file:

fuel-pump-current-waveform.pdf

Relative Compression Test

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The relative compression test monitors starter current (via a current probe and scope) during cranking to get a quick gauge of the compression of each cylinder relative to the other cylinders.  This is a quick and easy test which can be used to check for any significant loss of compression in a cylinder.  More details, including known good waveforms are in the following PDF file:

relative-compression-test.pdf