BUCKETASS

And check eng light just flashes in diag mode.

Car towed in, cranks..no start. No Injector pulse, No spark.

Have power to injectors but no ground. Replaced ecm.. still same thing.

Ohm'd M.A.F. sensor at terminals THA/E2 and have 2k-3k (Komhs) but goes to -7k while cranking.

But we do have cold start injector pulse...

Replaced both ignitors (used)
replaced ecm (used)
both caps/rotors new
both cam sensors and crank speed sensor.

Have performed all continuity checks to and from all sensors but still have no ground to injectors and both coils...



anybody else run into a no start like this?

cation

If I was you I would trace down the the cause for the bad grounds. Take a look at your IGN and EFI fuses and Relays to make sure they are functional.

Here's a silly question: Did you read the ECU trouble codes since your CEL is flashing? This could further clue you in to the problem if you haven't already done this.

Did you check for continuity in the ground wires from from the coils to the igniters? In my 93' FSM it shows connector ED2 between coil 1 and ignitor 1, I wonder if this connector could be the cause of your problem... If there is a short in that circuit it may be shutting down the rest of your ignition and fuel system as a fail safe. Just a thought...

I hate electrical gremlins.

Send me a PM if you'd like and I'd be glad to try and help you out...

BUCKETASS

Thanks for the reply.

Yes I checked the continuity between the coils and ignitors.

All fuses and relays are good as I function tested those as well...

The check engine light just flashes.. not in a code giving sequence, just flashes on/off all the time.

I've checked all the ground junctions as well.. all of them on the car.

I even had our key guy come verify that it's not the security system causing this.

I even removed the ignition switch and function tested it...


I think the customer is burnt..

I've been doing this for 20 years and am an A.S.E. Certified Master Tech with L-1 Cert as well.

First car ever in my career that I can't figure out.... guess it only took 20 years

time to retire now.... hahahaa

would have been alot easier if this was an obdII car for sure..



if you think of anything else let me know please..

Bali26

I think its the immobilizer (security).
Have you tried connecting spark ground directly to +ve terminal of batt? How about Injectors? Is battery bad? Ecu bad? Major electrical short somewhere?

still think its the immobilizer.

BUCKETASS

Please read first 3 posts..

cation

I'm sure you've already done it, but what about checking the coils themselves for an internal short? Couldn't hurt to try swapping those out at this point either. The flashing CEL has to mean something... Have you got on TIS to try and search for a solution to the problem?

https://techinfo.toyota.com/techInfo...l=ti_home_page

It's like $10 per day, but you have access to EVERYTHING technically related to Toyota cars and trucks.

I'm curious to find the solution to your problem and will try to do more research myself once I'm home from work. Good luck bud!

BUCKETASS

yeah we tried the coils themselves as well..

I called a buddy of mine that used to work for Toyota drivability dept at a dealer here in town. He says it's the harness is probably smoked somewhere..

He gave me Toyota T.A.N. phone # and dealer code... those guys are rec a harness as well..


I also looked under the intake today to find a new starter had been installed... nobody said anything about that, that info would have been useful days ago...

so off with the intake looking for crushed wires... nothing. Put it all back together and crossed my fingers hoping it would start... no dice!


Car got pushed out today, cust doesn't even want it back with 240,000 miles.. to the dirt it goes!

Thanks for all the help and replies..

PureDrifter

iTrader: (10)

....i might be interested in it.

python

iTrader: (4)

what year is the car? obd1 or 2?

xsc2003

I've got a car with the same or similiar problem. I have put a new fuel pump, F/P Relay, EFI Relay, Ohm'd Transmitter, Injectors have power, has spark. All it does is sit there and turn over. The fuel pump isn't even kicking on. I can straight wire the fuel pump and the fuel pump will run. I've also tried to start the car this way and it want run like that. But if you spray ether into the throttle body the car wants to run. I've trace wires for days to look for any cuts, slash's, knicks or anything, and I couldn't find one. I've replace fuses and relays like there going outta style. I dont know anything else to do.

eyecon7

iTrader: (2)

Bump, I Also need help, cant seem to get the car to turn over, BTW, isnt the wiring harness 2 pieces?

rohan9602

Trying to fix my 2000 rx300.
same situation you discribed.
has spark, fuel pump working. injector has power but its not grounding through ECM
what did you end up replacing in your case ?
Please let me know ASAP.
thanx,.
Have a nice day.

RA40

iTrader: (6)

Not familiar with the RX and in the absence of readable error codes, leads me to this thread:
https://www.clublexus.com/forums/ls4...capacitor.html

Can be other possibilities those symptoms do come on gradually indicating there are problems.

dicer

No signal to injectors, either faulty ECU, or sensor or path that gives the ecu the timing signal.


Helpful idea.....