I have a 1996 Mercury Tracer 1.9L motor, 2 weeks ago it sounded like the
egr valve was making a pinging / knocking noise. well on a saturday morning
on the way to work i drove about 10 miles from home and the pinging got
louder the i came to a stop sign, drtove of got up to 60 mph and the engine
just shut of. It will not restart at all. it does not have any codes
already hooked it up to snap on solus, has fire so it is not coil pack,
timing belt is not broke, already put new map sensor on its not that, it
has good fuel pressure to rail...so could this be the EGR valve causing this??
I doubt its EGR-related. If the EGR were not functioning you might not
pass a smog inspection, but not sure how it would prevent your motor
You verified that you have spark and fuel, so what else is missing from
problems with valve seats falling out and disabling 2 or more cylinders.
The common scenario is: the vehicle runs fine, Park it overnight. Start the
and it would start, run rough, then stall. After that, it may run on 2 cylinders
not at all.
Regarding auto repair? Tons of stuff...
But getting back to basics, thermodynamics 101: Spark, fuel,
My unqualified guess would be flooding out due to lack of air flow, I
would inspect the idle air control valve and circuit. Maybe crank mode
from the PCM isn't actuating the solenoid when you turn the key. Maybe
the IAC is so dirty the solenoid cannot move. Hard to tell from here.
Clean the IAC with some carb gumout... try starting with the IAC
unplugged from the harness, might get lucky identifying the problem
Home mechanics 101: poke and hope!
I think an engine needs three things to start, spark, fuel and air. My
guess is no air in your case. And unless your throttle body is sealed
shut by a gelatenous mass of an unidentifiable substance, I would start
with inspecting the IAC.
In my readings of Ford service manuals I think I recall coming across a
sentence or two describing crank mode of the IAC circuit, which is full
open solenoid (full voltage applied) for a few seconds after ignition
is successful until the idle calms down to normal, AKA "fast idle". In
addition to starting one this feature is also designed to help cold
engines get warm.
Pull the IAC and clean her out. Connect the solenoid to the car
battery with some test leads and observe the response. Tell us what
you can find out. If my guess is way off the mark, let me know.
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