Question about BMW 325
Hi, Unfortunately he could be correct in his assumption but, has there been error codes? if, the ECU is faulty it would show a picture like an engine on your dashboard, has this happened? if not then really i would advise to get a second opinion, but do not inform the other people what has been told to you already, as you may get the same result best just to ask them and see if there diagnosis is the same if it is, then ime sure you could purchase another one from a breakers yard for far less, all you have to make sure of it is for the same year of vehicle and same engine and fuel type, then it should be a simple case of swapping it over, but i would definatley get a second opinion first....hope this helps please vote thanks
Posted on Jul 28, 2010
A bad coolant temp sensor for the computer will do that exactly and costs alot less than $660,00 ... I would get a second opinion.
Posted on Jul 28, 2010
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Posted on Jan 02, 2017
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Following list of possible faults should help:-
Coolant sensor - engine is signaled as being 'cold' all the
time, not just at start up, causing ECU to set longer injection cycle
? Low coolant level can prevent sensor being able to detect coolant
? Faulty 'open' thermostat allows coolant to circulate without regulation
and perhaps prevents the engine from achieving normal running temperatures.
FPR - broken diaphragm allows fuel to enter
the vacuum line and then into the inlet manifold. Additional source of fuel
makes the fuel air mix richer causing a faster and lumpy idle.
Vacuum leak - 'high oxygen' signal
from O2 sensor causes ECU to set longer injection cycle.
O2 sensor - 'high oxygen' sensor error
causes ECU to set longer fuel injection cycle
MAF - 'over reads' in error the amount of air
entering causing ECU to set longer fuel injection cycle
IAT - 'under reads' in error the temperature of incoming air causing ECU to set longer fuel injection cycle
May 10, 2011 | Pontiac Grand Prix Cars & Trucks
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