Check for 5 volt reference signal at the TPS - throttle position sensor , could have shorted sensor causing the problem . Do you know what a computer 5 volt ref. signal is ? Video's on youtube . Your engine computer controls the starter motor relay which turns on the starter . Free wiring diagram's here
http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine . Under system click on engine ,then under subsystem click on starting . Click the search button then the blue link. Find the starter motor relay in the under hood fuse / relay box , pull it out an look at the bottom , where the pins are . You should see four set's of numbers , 30 , 87 & 85 , 86 . PIn's 30 & 87 are for the power feed to starter , pin 30 should have battery volt if tested with a voltmeter . If you jumped pins 30 & 87 with a piece of wire if the starter is good an battery cable an connections are good the starter would spin the engine over . Just so your not confused , jump where the relay plugs into the fuse box , not the pins of the relay .
5 volt reference
If the 5 volt reference is good , check power an ground circuits to the PCM - engine computer .
If that is good , suggest you take your vehicle to a qualified repair shop for more indepth testing .
SOURCE: where is the crank sensor located on 2005 chrysler pt cruiser?
the crank sensor is located on back right side of engine by were the trans. bolts up.is the no start when could or hot?
SOURCE: Crankshaft Position Sensor location 04 PT Cruiser
It is located behind the **** of the starter on the front of the engine starting in '03 the 2.4 lt was changes the repair manual failed to update this..you may sneak it out with small fingers with out pulling out the starter.
SOURCE: 2004 chrysler pt cruiser starter motor removal
You may sneak it out with small fingers with out pulling out the starter.
If starter removal is required,Just unhook the battery cables,Remove the 2 bolts holding the starter on.
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SOURCE: I have a 2008 pt cruiser. The engine light is on
My PT cruiser is a couple of years older, but I had the same problem. Drove fine, but start-up was erratic for several weeks. By the time AAA arrived, it usually was working fine. But when it suddenly started "struggling for power on the freeway and further along on the same trip, lurching (on a city avenue) I drove straight to my mechanic. It WAS the same sensor . . . and car has been driving perfectly ever since he changed it.
SOURCE: '05 PT Cruiser O2 sensor problems.
I had a similar problem with my car. It turned out the O2 sensors were fine and the issue was a leak in the throttle body causing the engine to run lean. If you have an ODB2 scanner you can look at fuel trims, etc and will be able to tell.
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