A lil background, wife's SLT with the 4.7 started bogging, sputtering etc....no codes. Changed plugs, cleaned throttle body and components, (chainged IAC and other sensors) new O2 sensor and cat (it was burned thru) checked fuel pressure, good, spark good. Relays for fuel good. Drove a day or 2, was smoother but then quit running. Checked fuel again, nothing. Changed fuel pump. It comes on....relay fires, nothing. Really stumped on this....any help is appreciated .
02 SLT 4x4 no start
- Thread starter Crash1008
- Start date
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dapepper9
Senior Member
- Joined
- Feb 7, 2013
- Posts
- 5,908
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- Location
- Iowa/Nebraska Border
- Ram Year
- 2001
- Engine
- 5.9L V8
You might want to post in the 3rd gen section as we don't deal with 4.7s.
However, it sounds like you're saying spark is good and you have fuel pressure with no fire. If that's case you may want to start looking at what tells the injectors when to fire. Our 5.2 and 5.9s for example, though a different engine, run a cam pickup sensor that senses camshaft rotation. This rotation is what the pcm uses to time the fuel injectors. No signal or bad signal often won't throw a code but will cause a no start condition.
However, it sounds like you're saying spark is good and you have fuel pressure with no fire. If that's case you may want to start looking at what tells the injectors when to fire. Our 5.2 and 5.9s for example, though a different engine, run a cam pickup sensor that senses camshaft rotation. This rotation is what the pcm uses to time the fuel injectors. No signal or bad signal often won't throw a code but will cause a no start condition.
