...bad and if you unplugged it it would die. So try cleaning the EGR valve and throttle plate first. The Maf or mass flow sensor does three things one determines air baromertic pressure Dinsity of the ...
...Bad ground to Electronic Control Unit (ECU) or ECU failure-check grounds or replace ECU 1119 Transmission Range - Defective wiring. Check for break or short. 1213 Vehicle Speed Sensor (VSS) - Check ...
...test for fuel pressure regulator. This is done using a gauge to read pressure while engine is running. You find out if pressure regulator is bad observing how pressure drops down after turning engine ...
...bad fuel could clog it early, resulting in fuel starvation. Algae or bacterial growth in the fuel tank could also clog the lines. Boost leak - a cracked hose or loose connector lets measured air out. ...
test that the constant battery terminal and the fan harness terminal have continuity meaning the circuit has closed. If the circuit has not closed or the relay has not clicked, the relay is bad. Check
...bad. NOTE: On some models it is possible for the 5 Volt reference signal to be temperarily shorted. This can happen if an engine sensor internally shorts the 5 Volt reference. Since the 5 Volt ...
...test. rough idle my be caused from a number of issues including bad motor mounts, bad gas, incorrect spark plugs, or incorrect spark plug gap, bad idle air control valve, air in cooling sys,
air in. Aside from becoming fouled, the mafs can sometimes actually go bad too. Testing testing testing.... there is an automatic choke i think this is sticking dissconect this and check car idle then
Question about Volkswagen Jetta
...throtlebody, check that and for vacuum leaks, make sure tps is good sometime it will test good when testing and go bad when it wants, you could have a bad tps and idle air control valve
...test computer controls engine idle thru a idle air control valve, air control valve could be dirty or bad, recomend to clean valve and clean throttle body bore with cleaner and see if idle ...
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