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What can be done about a faulty brain box

One of the plug coils is not receiving electrical signal from the ECU. also when the car is ascending a hill, the RPM needle goes very high and the speed of the car drops. I have not tried anything so far.

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Hi! Assuming the ECU is faulty there are some options for you!
1. The problem can be identified and repaired by someone who knows how to do so
2. Sometimes the previous option is more expensive than buying a new ECU to replace the faulty one. Even a used or refurbished one will do the job!

However, before deciding to replace the ECU you need to make sure that it is the ECU that is faulty! This can be easily verified by connecting it to a "computer" which will tell you if the ECU is faulty!

If you need more assistance please report back! Good luck!

Posted on Apr 09, 2015

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1 Answer

Eng code p0016


P0016 fault is poor crank/cam correlation. In other words the signals the ECU is receiving from the crank and/or cam sensors isn't making any sense and this could be caused by bad cam timing, wiring, connectors or the ECU itself or by faulty sensors but as you have changed these, probably not.

Sep 13, 2015 | Cars & Trucks

1 Answer

Brain box


It definitely sounds like an electrical problem. You should add more details to narrow the search.....such as it works sometimes.....or it is worse on humid or rainy days. These kind of details would indicate a faulty, or dirty connection. It does sound like the first place to start would be the ECU or main computer. I myself would disconnect the connectors in and out of that black box. Then I would spray them with electrical cleaner/lubricant then see if that helps. Of course swapping out a known good ECU would really help, but returning one of those could be problematic if that didnt cure your problem. If it is the humidity because of the change of seasons.....try letting the car dry out in the sun with the doors open.

Apr 20, 2014 | Buick Rendezvous Cars & Trucks

1 Answer

1994 Geo Metro will not start


all spark plugs dead. and at the main coil?
in this case after fuse (test them , ones that look good can be bad)
these steps work or all EFI cars made.
first is the rotor spinning cranking, if not the cam belt snapped!
a 1 second check, do you try to run 60k mile belts 200k ?


  1. CEL lamp on? key on? no crank? y/n,, if no the ECU is dead. or lamp burned out, we fix this FIRST. for next tests.
  2. I insert the diagnostic jumper clip (paper clip)
  3. the CEL now flashes codes, write them all down.
  4. I then crank for 5 seconds. and release the key.
  5. The ECU then reports live codes. beyond above stored codes.
  6. The ECU is very good at finding bad crank or cam sensors dead or even missing pulses, 1 in 10 lost. trust it, on all cars ......
  7. if no sensor code errors or spark bad errors then do the next things.
  8. The ecu also reads back the Tacho signal and will report dead tacho, sig, the ECU creates this and is the COIL drive signal to the ignition coil via the IGNITOR device.
  9. If the ignitor dies, or the coil primary opens, (dead Ign.coil) then the ECU see this and gives you Spark fail codes, cranking only!
  10. if you get far with a dead ignition coil, the ignitor is bad or the coil assuming coil even has power 12vcd key on.
this is all in the FSM, if you read it.
as is the Ignitior tests, and the coil tests.
The FSM is an amazing thing if your read it.
buy one.

ECU = engine brain, or EFI brain
EFI = eletronic fuel injection
CEL is the check engine light also called SES or MIL.
your ECU is OBD1 and no scan tool works .
only the winky blinky light.

Mar 04, 2014 | 1994 Geo Metro

2 Answers

1990 nisan n13 motor 1.6, has no spark to coil i drove car to train station, when i got back the car would not start, replaced coil, distributor, ecu box, all fuesible links, plugs & plug leads, fuel...


Your car has both a crank and cam position sensor. First start with your crankshaft position sensor. It is located by the harmonic balancer on the front of the motor.

Nov 28, 2013 | 1990 Nissan Pulsar

2 Answers

No spark at cylinders 1&4


Considering the whole system runs with a common crank sensor, the first place I would test would have also been the coil. If these have been tested and are ok, I would start looking at the ecu. The signal to the coil is generated by the ecu and unless there is a break in wiring, it is more than likely the problem.

If you have access to a wiring diagram, check for the coil trigger signal from the ecu. If this is present at the ecu, problem is wiring. If no signal at ecu then that's your problem.

Keep in mind that cyl 1&4 and 2&3 fire together off common coils in the coil pack so the fact that those cylinders are faulty together, also leads to ecu.

I know the fiat's have a history of problems with ecu- especially if the vehicles are valet'd and the engine pressure cleaned.

Please give us feedback regarding what you find- hope I led u in the right direction!

Apr 09, 2013 | 2001 Fiat Punto

1 Answer

My1998 chevy blazer only runs for a few seconds. I replace,fuel pump,filter,plugs,wires,injectors, brain box,cap,rootor.lots of gass in line.what do you think?ITS LIKE A RELAY OR SOMETHING IS KEEPING THE...


It would seem like a problem with the ECU or the fuel pump, but the common link between those two systems is the ignition module that is located on the distributor under the distributor cap, and that module is actually responsible for the fuel pump signal to run the fuel pump, the dwell signal to cause the ignition coil to fire, and also the signal that the ECU uses to time and fire the injectors, and you can remove the ignition module and have it tested for free at most auto parts stores.

That does sound like a malfunction with the ignition module inside of the distributor, and you can remove the ignition module and have it tested for free at most auto part stores.

If you do purchase a new ignition module be sure that it does come with a silicone grease or a die-electric compound because it is a heat sink and the ignition module will burn up without it.

To install the new ignition module first clean out the mounting surface inside of the distributor. Then completely coat the metal contact surface under the ignition module with a thick coat the silicone grease or die-electric compound and do not leave any of the metal contact surface of the ignition module un-coated with the silicone grease or die-electric compound, and be very careful not to over-tighten the ignition module or it will be damaged.

Jun 17, 2010 | 1998 Chevrolet Blazer

1 Answer

I have a 1994volvo 850 turbo. This car Mostly Doesent Start. The Coil Is Not Fireing. Upon Checking Their is no Triggering Signal at the Igniter.The car Must Have a Crankshaft Signal as when cranking the...


check or replace the cam sensor, this sensor sense the turning of the cranksaft by sending info to ECU telling ecu to tell the coil to disperse the sparks. is the cam sensor is faulty than you will not get any fire/sparks from the coil assuming the coil, wires and plugs are good. crank sensor does the same but turn on the fuel pump. hope that help some

Oct 03, 2009 | 1994 Volvo 850

1 Answer

2001 Daewoo Lanos Fault 63.58X 'B'


DTC 63 Will Set When
No voltage is supplied by the ECM through the EST “B” line while reference pulses are received by the ECM from the crankshaft position sensor
check white wire terminal B on ignition coil to ECM terminal C14 for open circuit or short to ground while disconnected if thats ok check for voltage signal at B while cranking no signal ECU faulty. voltage signal also on A terminal while cranking and check earth terminal C to body no higher than 5 Ohms
power is terminal D 12V
if getting power, earths good, and both signal voltages are going into coil pack, coil pack is faulty.

May 30, 2009 | 2001 Daewoo Lanos

1 Answer

No fire to my plugs


It all sounds like you have a bad computor. If you are not getting fire from the coil. The source will lead you back to the brain source, (The Computor). Go to the local junk yard to get another one at half price.

Jan 22, 2009 | 1993 Toyota Camry V6

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