Skip the auto shop - Our mechanics make house calls

Q: hi i have a fiat sienna that has no pulse on the injectors from the ground in the ECU. the car has spark on the plugs and the pump

asked by on

hi i have a fiat sienna that has no pulse on the injectors from the ground in the ECU. the car has spark on the plugs and the pump
My car has a manual transmission.

A: Hi there. No injector pulse, more than like...

Hi there. No injector pulse, more than likely, is a faulty ECM. There are steps you can take to confirm the problem. Accessing the ECM (electronic control module) for codes may help direct you towards the area of fault. Having spark would lead me away from a crankshaft position sensor. Assuming voltage is being supplied to the injectors. You may need a scanner with parameter capabilities to diagnose the problem. Performing circuit test(s) from the injectors back to the ECM would rule out a wiring harness fault. I recommend having your vehicle’s no start condition be diagnosed and repaired by a certified technician from YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: oil level not showing correctly on the dipstick

Hello. It sounds like you may have an issue with oil sludge. If there is sludge build up then that will cause this. Any sludge build up will keep the oil from draining into the oil pan and can affect...

Q: Having trouble diagnosing a stalling issue, do I need a new fuel pump?

If the engine is not getting fuel then it may need a fuel pump. I would start by checking to see if the engine is losing spark or fuel when this occurs. Knowing if the problem is spark or fuel...

Q: Does the VIN number have to be in the ECM for the vehicle to run?

Some new ECMs will give you a certain amount of free starts before it will not start unless the VIN is added. I am not sure if this is the case with your ECM but you have a dealer telling...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...