Question about Cars & Trucks
stay on = stuck? (injects full time?)
MPI, most MPI cars are PNP, Plus, neg. Plus fired.
that is all injectors on one side are 12v key on(power bus)
then the ECU fires each injector by a pulled ground (a transistor does that)
if the ground pulse is missing
1: the injector coil open (burned open , infinity ohms)
2: or the ecu driver is dead.
use and ohm meter (resistance ) DMM and measure the coil on all
4 ,they will all read the same , many are 10ohms
0 ohms shorted, way different burned up, Infinity, burned totally up.
Posted on Oct 16, 2013
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Posted on Jan 02, 2017
SOURCE: no injector pulse
absence of ground pulse means there is some kind of shorting circuit in your control circuit.
which can make the ground pulse to get shorted there itself preventing it to reach the circuit properly.
don't forget to rate the solution
Posted on May 27, 2008
This sounds like a main relay problem here is a diagram its located under the dash under steering column its the brownish -orange box in the picture. http://www.tegger.com/hondafaq/mainrelaylocation/7-main_relay_closeup.jpg Good luck and thanks for using FIX YA
Posted on May 15, 2009
If you used a noid light to check the pulse at the injector wires and didn't get any to light then the quad drivers in the ecm are bad. No way to fix this. you will have to get a new computer and have it programmed. you can get a computer at the junk yard as long as the numbers match, and there are a series of numbers that will go to that car. you have to go to the dealer to have it programmed, unless you find one with exact numbers.
Posted on Nov 10, 2010
SOURCE: 98 toy sienna no spark
not sure about yours but just to give you some kind of idea on alot of vehicles the computer controls the ground. You will read voltage but no ground enough to drive you insane.
Posted on May 04, 2011
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