For over a year, about once a month I start this Jeep and run it about 10 minutes. Zero problems until yesterday. It has fresh gasoline just added, cranks over fine, has spark (I have a spark tester) but will not 'pop' over. Upon closer inspection I see it has at least 6 Bosch type relays under the hood and know if one sticks something will not turn on. Any idea's where to start troubleshooting?(I am a retired US Navy diesel generator mechanic).
spray some ether in the intake and see if it fires, if so follow the fuel system until you find the issue. Make sure the fuel pump is running, and make sure you are getting fuel to the engine. A bad fuel pump relay or plugged fuel filter could cause this. Also check your air filter, in one case i saw a vehicle where someone had checked their oil then left the rag under the hood, well the engine creates a vacuum when its turning over and running, well it pulled the rag into the air box and plugged the filter.
My first wager may be the gasoline filter out or carb is plugged. gasoline filters will ultimately plug themselves after sitting for a together as. If that would not do it, get a carb rebuild equipment, sparkling all the passages and bowls out good. in case you detect diverse gunk interior the bowls, it is probable the hardship. If that would not artwork, your timing chain might have slipped. in case you have gasoline and spark, often an engine will initiate. yet whilst the timing chain is off, the valves are not establishing on the splendid time. it is going to nonetheless sputter like it needs to run, yet will not be able to. Take the valve conceal off so which you will discover the valves for #a million cylinder. Rotate the engine to good ineffective center. The valve rockers might desire to be somewhat unfastened at this factor and the rotor pointing to the #a million spark plug twine, if not rotate yet another turn to TDC. If issues do not look lining up, your chain might desire to have skipped a tooth or 2. style of a huge interest to interchange it (using fact it has stretched), yet not something actual significant. good success.
