Ignitor Assembly going bad - me thinks

[Joel87GT]

I called my friend in VA Beach - (toyo technician). explained when aggressively driving at WOT and coming to a stop at engine idle then engine would shut off.

After all we discussed on Free Weekends minutes. He thinks it might be my ignitor assembly (Part #89452-20300) going bad. He said it be most obvious since most everything in my electrical has been upgraded except the Ignitor Assm. After 17years - the ignitor is bound to fail soon. He said the purpose of the Ignitor Assm controls the firing and timing for combustion. I said, Ok - I will see to it be replace soon. I visually inspected the Ignitor Assm. It was all caked with white chalk or maybe lime. Pulled the plug and inspected M/F conntectors - looks clean. Ran Diagnostic again. Fuuuchhhhh. Code 43, Starter Signal and Code 14 - Ignition Signal. Shit - I hope its not my MSD 6AL going bad.

All replaced this week. 13 August 04.

-----------------------------------------------
TPS $73
Alternator and Belt $140
Fuel Filter $17
Distributor Cap Wires $40
Spark Plugs $20
Ignition Coil - $30
EGR Vacum Regulator - $75
__________________________
Tested Battery - Ok.
Check all ground wires - Ok.

Well I called the Toyo Dealer and asked the part #20300. I said," Excuse me, Baking Powder?" $457.00!?! SHit - AZ tax tat will be about 485. Now - I'm thinking about hitting a junkyard. Hopefully the junkman wont know the value off a 4g celica. [cracks knuckles]


I'm trouble shooting every wire right now.

[Jeremy]

Your technician from virginia beach is wrong about the purpose of the ignitor, all a ignitor is, a voltage amplifier, the ECU controls everything the ignitor just steps the voltage up for the coil, switches a ground on & off to trigger the coil & it sends back a signal to the ECU telling when the coil fired.
Heres a little document straight from the University of Toyota, about the ignition system.
www.4gcelica.net/temp/ignitionsystem.pdf

[Joel87GT]

Jeremy said:

Your technician from virginia beach is wrong about the purpose of the ignitor, all a ignitor is, a voltage amplifier, the ECU controls everything the ignitor just steps the voltage up for the coil, switches a ground on & off to trigger the coil & it sends back a signal to the ECU telling when the coil fired.
Heres a little document straight from the University of Toyota, about the ignition system.
www.4gcelica.net/temp/ignitionsystem.pdf

Ok I'm redemming another NOOB coupon. Can anyone tell me where is the ECM? I hope the ECM isnt embedded in the ECU. I dont want to think the cost of new ECU right now. arrrrrrrghhhhh.



Minutes Later.....
I have narrowed down the stall ... It happens when I depress the clutch going into gear. I counter the stall by double clutching before going into gear and giving it gas. I'm refering to chap 12 electrical system. Could it be clutch start relay?

[Joel87GT]

Ok - knowing that stall when depressing clutch. I decided to drive in the dark w/ no dash lights on. When pressing the clutch to go in gear. I saw a spark of light when pressing the clutch. Ahhhh, I got a short either in the clutch switch or one of my wires is rubbing against the clutch pedal assembly. Sure enough I press the clutch I saw spark of light under dash and engine about to stall.


Finally there is light at the end of the tunnel. I'm off to bed.

Goodnite Jeremy and Amanda.

[Joel87GT]

Got up this morning and fixed the shred wire rubbing against the clutch pedal. Press the clutch car doesnt stall anymore.

Drove my 87GT 88N to Tonto Lake off Apache Trail and back. No problem - she's fixed.



88N is a very twisty road - any wrong turn you go down the cliffs.