Bad camshaft sensor?

Tiny
THARPTOWN
  • MEMBER
  • 1998 MITSUBISHI ECLIPSE
  • 2.0L
  • 4 CYL
  • FWD
  • MANUAL
  • 155,456 MILES
It cranks without the cam sensor but won't hold an idle. As soon as I put the cam sensor back on it won't fire at all. What's wrong?
Monday, September 15th, 2014 AT 4:44 PM

19 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
May not be related, but first scan and report any fault codes, you will have a code for the cam sensor already, so do a code clear and do a re start and then check for codes. these guides and the sensor location is in the diagrams below.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (Below). Please let us know what happens.
Image (Click to make bigger)
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Tuesday, September 16th, 2014 AT 2:48 AM
Tiny
GREDDYRCNG
  • MEMBER
  • 4 POSTS
  • 1998 MITSUBISHI ECLIPSE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 133,000 MILES
Could this be the ECU or just a faulty camshaft position sensor it is new from oreilly's
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+1
Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test it-to include the wiring could be it-if the wires checks out to and from the computer and the resistances are okay-you know what that means.
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
MITSULUVER
  • MEMBER
  • 13 POSTS
  • 1996 MITSUBISHI ECLIPSE
Electrical problem
1996 Mitsubishi Eclipse 4 cyl Front Wheel Drive Manual 130k miles

can anyone can help me locate the camshaft positioning sensor on the 420a motor. This sensor could be the cause of all my problems so please let me know if u know
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Check at the top right end of the cylinder head
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Located on end of cylinder head


https://www.2carpros.com/forum/automotive_pictures/12900_cmh_1.gif

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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
  • 1995 MITSUBISHI ECLIPSE
  • 11,500 MILES
Okay so I have a 95 Mitsubishi Eclipse GST that was recently rebuilt from the engine ever since the rebuilt I have not been able to get the car running how was supposed to run the car will start but only if you disconnect the cam sensor but it will shut off right away what can I check or what can I do to fix this problem?
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
What is the compression?

Roy
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
And is the valve timing done correctly-you can be getting fuel and spark but she will refuse to start-Do the compression check wet and dry and then give us the readings, so we can help you further-
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
The compression is 147 almost to 150 on all 4 pistons
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
The timing is all done by a mechanic at a shop the number 1 piston is on top and everything else lines up tdc
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Put the engine no.1 piston on TDC and crankpulley at 0/TDC markings-open the dizzy cap and look if the rotor is pointing directly to the no.1 cap tower if not its not done right-
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check if the injectors are energizing providing fuel to the cylinders
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
It uses a coil pack it's turbo charged
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
And we have checked the injectors with noid light and it checks out good on all 4 they all have pulse as a matter of fact I think it's running too rich
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure if its within specs and give us the readings
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
The last time we checked it the reading was at 50 psi but now it has a fuel pressure regulator so we have it set at the specs of what the manual says
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Your fuel pressure is way too high-see below

FUEL PUMP

REGULATED FUEL PRESSURE
ApplicationAt Idle W/Vacuum psi (kg/cm2 ) 33psi and At Idle W/O Vacuum psi (kg/cm2 )
Eclipse 41-44 psi (2.8-3.1)
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Monday, October 19th, 2020 AT 4:23 PM (Merged)
Tiny
95 BLACK KNIGHT
  • MEMBER
  • 7 POSTS
Thank u very much I will make sure I get it set to the exact specs and I will let u know what happens. But why is it that it would only start with the cam sensor being unplugged does that have to do with too much fuel going to the pistons so they would get drowned out cause of the high fuel pressure
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Monday, October 19th, 2020 AT 4:23 PM (Merged)

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