Cam Issue?
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Pulled that spring out and it was not attached to the triangular piece behind it - My spare assembly these two pieces did seem attached, threw the spring in from the spare assembly and its still not building fuel pressure while cranking.
We've actually had 3 CPS ' s in the truck since it started acting up - the new one I purchased was off brand, the new one the owner had purchased I'm not sure where it came from. I'll get one from ford tomorrow and try it, if the off brand ones are so notorious for being garbage. Keep in mind, when the truck would run but stall constantly, the symptoms were identical with all 3 CPS's.
Keep the ideas coming... much appreciated...
We've actually had 3 CPS ' s in the truck since it started acting up - the new one I purchased was off brand, the new one the owner had purchased I'm not sure where it came from. I'll get one from ford tomorrow and try it, if the off brand ones are so notorious for being garbage. Keep in mind, when the truck would run but stall constantly, the symptoms were identical with all 3 CPS's.
Keep the ideas coming... much appreciated...
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New User
Joined: Oct 2012
Posts: 9
Likes: 0
I have access to a scanner on occasion. I have a spare IPR here now. Is there a good sticky or link to what to look for on the scanner? I had it hooked up when it first started acting up, but really didn't know what I was looking for - we buzzed the injectors and a couple other generic tests that didn't reveal anything problematic. It wouldn't take too long to swap the spare IPR - I'm getting pretty proficient at taking that stupid fuel bowl out 
Tuned
Joined: Apr 2009
Posts: 307
Likes: 2
From: OR
I have access to a scanner on occasion. I have a spare IPR here now. Is there a good sticky or link to what to look for on the scanner? I had it hooked up when it first started acting up, but really didn't know what I was looking for - we buzzed the injectors and a couple other generic tests that didn't reveal anything problematic. It wouldn't take too long to swap the spare IPR - I'm getting pretty proficient at taking that stupid fuel bowl out
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New User
Joined: Oct 2012
Posts: 9
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Spare in, no dice. Still less than 10 PSI cranking at the shraeder. Don't I need fuel pressure for this thing to fire? I feel like replacing CPS/IPR/other sensors isn't going to fire it if the symptom is low fuel pressure. FSV worked spot on when we were cleaning the lines - I'm more of an IDI guy and I've seen the FSV's fail on those trucks, usually fairly obvious. Back to the original question - why can't I get more than 10psi out of the valve? isn't that necessary for these beasts to fire?
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