1995 Ford Contour

Tiny
KENAHEWITT
  • MEMBER
  • 1995 FORD CONTOUR
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
The car will not rev past 3500 rpm at wide open throtle. At half throttle in first gear it will approx 35-40 mph. Step on it and it is like there is a rev limiter on it. Doesn't matter what gear in at full throttle it misses and smokes. Won't go over 3500 rpm in park with out missing. Exhaust in clear, new plugs, wires, no check engine lightand good feul pressure.
Tuesday, November 25th, 2008 AT 8:49 PM

7 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Check the CAT with a backpressure test, if no obstruction, then I would suspect an ignition module/coil.
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Tuesday, November 25th, 2008 AT 10:36 PM
Tiny
KENAHEWITT
  • MEMBER
  • 4 POSTS
I Change out those parts already also the pcm. Which sensor sets the spark timing cam or crank? Iunhooked the cam sensor and the car ran the same. Unhooked the crank and it would not start. Also would poor power or a bad ground cause the problem. It acts like the spark is dropping out or the rev limiter is getting a bad signal if there is one. A little more info for the first Question The car will pull good at half throttle through all the gears and rpm range. Step on it even 3/4 throttle and runs terrible. Also checked timing on the cams, exhuast was out one tooth wouldn't start reset now I have this problem. Thanks hope you can help.
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Wednesday, November 26th, 2008 AT 9:41 AM
Tiny
MMPRINCE4000
  • MECHANIC
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Did you check the backpressure on the CAT? If clogged or partially clogged it can cause moderate to severe driveability problems.

Camshaft and crankshaft sensors are both critical to performance.

Other possibilities are ignition module/coil.

How did the belt get off one tooth? Did you change belts? If not then the belt is bad or the cam/crank sprockets may need to be replaced.
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Thursday, November 27th, 2008 AT 7:25 AM
Tiny
KENAHEWITT
  • MEMBER
  • 4 POSTS
The cam was off when my daughter bought it. Was hard starting when cold. The cat was cleaned out from previous owner. Starts and idles fine won't run at wot. Have a parts car that the trans is nfg been robing parts off to eleminate problems
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Thursday, November 27th, 2008 AT 10:51 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Camshaft Position (CMP) Sensor
CMP sensor is a Hall Effect magnetic switch. The Hall Effect switch is activated by a single vane, which is driven by the camshaft. On models with Electronic Ignition (EI), CMP sensor is mounted on back of cylinder head. On models with Distributor Ignition (DI), CMP is located inside distributor. On all models, CMP sensor provides cylinder identification information during engine start-up for PCM to initiate correct firing order.

Crankshaft Position (CKP) Sensor
CKP sensor is a Hall Effect magnetic switch. The Hall Effect switch is activated by vanes on the crankshaft damper and pulley assembly. The Profile Ignition Pick-up (PIP) is a crankshaft position signal that is sent to the PCM. The PIP signal generated by the Hall Effect sensor provides base timing and RPM information to the PCM.
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Thursday, November 27th, 2008 AT 11:44 AM
Tiny
KENAHEWITT
  • MEMBER
  • 4 POSTS
Bought a new coil and control module. No difference. I can get it to rev up by pouring gas from a pop bottle down the throttle body while holding the throttle plate 3/4 open. Lacking feul seems to be the problem.
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Wednesday, December 3rd, 2008 AT 11:36 AM
Tiny
DAVE H
  • MECHANIC
  • 13,384 POSTS
Check fuel pressure and regulator?

Fuel Pressure Regulator
Fuel pressure regulator controls fuel pressure supplied to injectors. Fuel pressure regulator is attached to fuel supply manifold assembly, downstream of fuel injectors. Regulator is diaphragm operated. One side of diaphragm senses fuel pressure, and other side is subjected to intake manifold pressure.
Fuel pressure is controlled by spring preload applied to diaphragm. Balancing one side of diaphragm with manifold pressure maintains constant fuel pressure at injectors. Excess fuel supplied by pump, but not consumed by engine, passes through regulator and returns to fuel tank through fuel return line.
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Wednesday, December 3rd, 2008 AT 12:26 PM

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