EzPz

Greetings Bikeboy:


Have you performed a fuel pressure test yet? I saw where you stated, but could you please provide me with your key-on-engine-off pressure results? And also the key-off-engine-off test results?


So far, it sounds as though your engine is getting fuel, and your ignition is good. If your timing remains at 0 BTC (I'm assuming you have a pre-1996 5.7 engine) with wire disconnected, your dizzy might be fine, although I would not rule that out.


I believe your timing chain is worn. How many miles are on your truck? The best way to calculate timing-chain slack is to take a piece of string and wrap the harmonic balancer for record total diameter (wrap string from one end of the balancer complete around until it reaches the end). Record the harmonic balancer distance. Next, remove the cap and slowly rotate the engine clockwise. Once the rotor button starts to move, draw a white mark the H-Balancer. Next, VERY SLOWLY rotate the engine counter clockwise and mark the H-Balancer as soon as the rotor button begins to move. Measure the distance from mark-to-mark (M2M), and subtract that from the total H-Balancer Measurement (THBM), giving you the Remaining H-Balancer Distance (RHBM).


Example:


Total Harmonic Balancer Circumference is 24" inches
Total non-travel of rotor button is 1.75" inches (mark-to-mark)


Subtract 1.75 from 24 = 22.25" inches


Divide 1/22.25 = .044


Now multiply .044 x 360 degrees = 15.84 (or 16 degrees when rounding)


This means that under this scenario, the total slack/play of the chain is about 16 degrees....meaning it's time to change that BEEE-AAAATCH. LOL


Keep me updated.


Joe

tahoez7124

really 14 psi? isn't that very light for such a big truck? ive always heard that my truck should have the psi in the 50s or so.