Skip the auto shop - Our mechanics make house calls

Q: Multiple trouble codes, no spark, no start.

asked by on

I have done a 1997 3.4 motor swap into my 1995 Toyota 4runner, had a wiring harness made by toy only swaps, got everything plugged in, motor cranks, has fuel but no spark. It is showing several trouble codes po 110, 100,115,120,335,340,758,773, the 758 and the 773 are to be expected because I am using an automatic ecu but had it repined to work with the manual trans or so I was told. I am not a mechanic nor do I claim to be but I know everything is plugged in and have verified that there is power to the coils, maf, injectors, igniter has power and is good, has fuel and my grounds are good, should I take the time to check each signal or assume the ecu or wiring harness is not doing what it should, any help would be appreciated.
My car has a manual transmission.

You are getting codes to each and every major sensor on the engine that is needed to run your motor. You either have a major malfunction with the ECU or a problem with the harness not being wired correctly. You will need to make sure that each wire, from each and every sensor input and computer output, is going to the correct pin in the harness connector to the ECM. You may need to ensure that the power and grounds from the vehicle to the new harness are the same on the 1995 and 1997 model. This is a pretty major job, it would take a mechanic hours to verify each and every connection. I’d suggest getting some help from a certified technician who can perform the necessary checks to diagnose the trouble codes and ensure that the motor operates properly.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Toyota Surf 1kz-te 3L 1994 - hard starting in the morning (ambient Temp. usually 30C) - have to wait for plug relay to shut off...

Hi there. Let me offer option #4 - cold start injector. The cold start injector is also known as the cold start valve. The part is located on the cold air intake, which is found on the intake manifold. It...

Q: Whats the problem with my truck? 1998 Toyota Tacoma

Hello - you may have an overheated engine, with a blown cylinder head gasket (or other overheating damage) or simply a run-down battery. The same serpentine belt that drives the alternator also drives the water pump. Depending on how long...

Q: EPS light came on

There is a problem with the logic which turns on the EPS dash light for your Forte, which is addressed with Kia Technical Service Bulletin TSB-10044130-2564. Check with your Kia dealer service center for this software update per this TSB....

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...