05 STARTS THEN DIES, THEN WONT START, ETC.

[H2RobP]

Initially was told to change out fuel pump. After installing I started it and it ran fine for 20 mins or so the just quit? I lowered tank and removed pump thinking somehow I purchased a faulty unit. After removing I noticed what seemed to be a loose connection on the pump I decided to put pump back in. This time I left the tank on the ground and hooked everything back up. I started and it idled fine for about a half hour. Just when I was conviced all is well... it died. I tried starting it for 5 mins and nothing...it just cranks with no start. Woke up this morning turned the key and started right up ..... WTH is going on??????

[H2RobP]

BTW - it stalled again after running for another 10-15 minutes

[Bimmer9938]

Did you recently wash the motor or gone 4 wheeling? If the TPS sensor gets wet it could do this.

[H2RobP]

OK - got it fixed. Replaced the crankshaft position sensor. Code reader picked it up even though no trouble light on dash. $45 at local Auto Zone and 30 mins worth of work. Runs Great! Good idea to read codes even though engine light is not on!