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I would not exactly disagree with the first two comments, but i would also check the torque converter bolts, or nuts to see if they were loose, (if its an automatic) which most probes with the v-6 came with an automatic... but its a real possibility of it being a rod knocking since it only knocks upon acceleration! good luck!
I agree with Ronnie- I know cars pretty well and mis-diagnosed a noise as an exhaust system rattle.
30 miles later, my son dropped a rod cap and messed up a parking lot pretty well.
Lousy Saturn . . .
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4 hours ago - Locate the knock sensor, which is located near the rear of the engine block, under the intake manifold. Disconnect the electrical connector from ...
Ford Probe Engine Runs Rough, Stalls, Hesitates on Acceleration, Hard Starting, Poor Performance. This is a verified problem based on 9 reports. Learn more ...
repairpal.com > Questions > Ford > Probe > 1997 Ford Probe
Dec 5, 2010 - Starting Problems on 1997 Ford Probe ... If the engine runs rough,stalls, hesitates on acceleration, is hard to start, or has generally poor ...
Knock Sensor Strategies: A failure with the knock sensor can cause spark knock and engine damaging detonation because the PCM will not know to ****** ignition timing if knock is occurring.
I suggest to replace spark plugs before you return back.
First, I would like to mention that most knock sensor codes are not caused by the knock sensors, but a mechanical problem with the engine. The knock sensors cannot differentiate between noises caused by mechanical problems like a bad pulley bearing, bad motor mount, noisy alternator bearings, etc. and spark knock. knock sensor codes are set when the computer has retarded the timing as far as possible to compensate for ignition ping (Spark Knock) and the noise still exists.
With that said, here are the instructions.
Remove the Intake Chamber assembly. Disconnect Injector connectors. Disconnect the heater hose from the Intake Manifold. Remove the 9 bolts. 2 nuts, 2 plate washers and Intake Manifold assembly. Remove right hand engine mounting stay and water outlet.
Disconnect the following hoses and connectors: Radiator inlet hose. Engine coolant reservoir hose. Engine Coolant Temperature Sensor connector. Engine Coolant Temperature Switch connector. Ground strap connector.
Remove the 3 bolts and right hand mounting stay. Remove the wire band. Disconnect the water bypass hose from the inlet housing. Remove the 2 bolts, 2 nuts, 2 plate washers and water outlet. Remove the 2 gaskets. Disconnect the Knock Sensor connectors. Remove the Knock Sensors.
try un-plugging the IAC motor,then start it,if it idles low and stays there then replace the IAC motor----if no change then you may have a knock in the engine and the knock sensor is telling the computer to change the timing to compensate for spark knock due to low grade fuel,so it advances the timing back and forth due to too high of rpm then too low and the computer doesnt know how to smoothen it out that fast,but eventually does.The check engine light would usually come on in this case
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