Its a 2005 700 EFI. I hooked up a pressure tester and took a ride for about an hour and half and it pegged at 42# and never waived until I ran out of gas (deliberate) Put gas in and it pegged at 42 again, even at idle it stayed at 42however it still ran with a light stutter. I am skeptical about pressure now, but????????. I wonder if the heat warming up the air box for instance and having the TBap sending wrong air temp or BP to the ECU or gas at a higher temp or something like this would make a differance. As far as being eng for this, I have worked with eng and arch all my life, big co's don't really care if it fails or has problems ( designed obsolescence)
Do you have a factory manual? The resistance specs for most of the sensors are in there. You can check them with a multimeter. Here's a writeup on checking the TPS without the special tool.
So fuel pressure is good and there is still a light stutter. Sounds like the fuel pump is working as advertised. If heat were affecting the sensors I don't think the problem would be very intermittent but would be fairly constant. Without hearing it, it's hard to tell. That's just a limitation of writing in a forum.
The manual says if the CPS is bad the engine won't run. What if the CPS is going bad or the wiring? An intermittent missed signal from the CPS would cause a light stutter because the ECU wouldn't know exactly when to fire the coil. The wiring on the sensor harnesses can appear to be good to the eye while the strands inside are actually breaking. Pull the individual wires and see if one is stretchier than the others. If so, that might be your culprit.
From the manual: The CPS is what they are calling the speed sensor. Also, use pins 9 & 10 on the ECU plug.
"CRANKSHAFT POSITION SENSOR TEST
The crankshaft position sensor is a sealed,
non--serviceable assembly. If fault code diagnosis
indicates a problem within this area, test and correct
1. Disconnect main harness connector from ECU.
2. Connect an ohmmeter between the pin terminals.
A resistance value of 560 Ω ± 10% at room
temperature (20_ C, 68_F) should be obtained. If
resistance is correct, check the mounting, air gap,
toothed ring gear (damage, runout, etc.), and
3. Disconnect speed sensor connector from wiring
harness. (the connector with one heavy black
lead) Viewing the connector with dual aligning
rails on top, test resistance between the
terminals. A reading of 560 Ω ± 10% should again
NOTE: If the resistance is incorrect, remove the
screw securing the sensor to the mounting bracket
and replace the sensor. If the resistance in step 2 was
incorrect, but the resistance of the sensor alone was
correct, test the main harness circuit between the
sensor connector terminals and the corresponding pin
terminals in the main connector. Correct any
observed problem, reconnect the sensor, and perform
step 2 again."