Intermittent Timing Control?
I've have my Go EFI (30002) unit running for about three years now wired into my SBC 350 High Energy Ignitions (HEI). However, recently I've been having random stalling (idling, decelerating, and under load); there doesn't seem to be a pattern. Sometimes, it'll only take a few minutes while other times it may take an hour before it stalls. When it does stall, it is very hard to get restarted and I often smell fuel as if flooded. But it normally doesn't flood.
The data log always shows the AFR running at the nominal 13.8 while idling (Status Idle) until just before the engine dies the AFR raises to 16 (Status Crank) and then the engine stalls (Status Stall).
Questions: Has anyone heard of the Go EFI timing control circuitry overheating then becoming intermittent? Can the control circuitry be replaced? If the timing control circuitry were overheating it could explain the random stalling, but I don't know how there could be a relation to the increased AFR though? Unrelated, how can I upload a log file that does not have a image extension (i.e. jpg, jpeg, gif, png, bmp, or pdf)?
I've checked my MSD coil and measured it against a new one both measuring ~1 ohm on the Primary and ~8k ohms on the secondary. Electrical connections: Main Power (Lg Red), Ground, Coil Trigger (black), Switched Power (white), and the Magnetic Pickup (vio/grn) all solid. I've checked fuel: inline filters, mechanical pump (6-9 psi), Fuel Control Center (FiTech 40003) pressure ~60 psi, and inside the FCC checking the vent, float, and needle valve; all good.
I'm running out of ideas . Thanks for any suggestions.
Is that one of the Davis Ignition distributors?
Quote from Austin DeHaas on March 24, 2019, 10:21 pmIs that one of the Davis Ignition distributors?
No, it's a Summit Racing (850001-1) and apparently had the MSD coil inside (I guess I hadn't thought about it until now). The electrical connections I described are from the Fitech. I used the Summit distributor for a while with stock vacuum and weighted advance until I figured out how to modify it for Fitech control, which is really great adjusting from the cab. Recently though, when I called Fitech to get some help with my random stalling problem they suggested that I could just go back to stock timing. But the timing control is one of the main reasons I bought the unit to begin with. So, I can came here hoping to get some suggestions/advice. 🙂
I really don't think you have an ignition problem. Sounds more like to me a heat related fuel issue. Just not sure what it might be.
This thing is driving me crazy. I've modified my Fuel Command Center (removing float and vent filter) so the fuel just re-circulates back to the tank; so the fuel in the FCC runs really cool now. But, it still dies after about 10 minutes idling, then won't restart until things cool down. I cleaned the inline brass mesh 40 micron filter to the Fitect with isopropyl alcohol, it looks perfect, and I can blow through the reassembled filter easily. Do you suppose there could be a blockage or fuel overheating inside the Fitect? I thought i might try attaching a pressure gauge directly on the Fitect to ensure i have good pressure when it dies.
When it won't start. Shut key off, let ecu power down, then watch to see prime shot when someone turns the key on. No fuel=fuel problem. If fuel, check for spark. Also check to make sure you have cranking fuel.
You can always hold a camera over the throttle body, if you feel it is safer....
Quote from Austin DeHaas on April 3, 2019, 11:13 pmWhen it won't start. Shut key off, let ecu power down, then watch to see prime shot when someone turns the key on. No fuel=fuel problem. If fuel, check for spark. Also check to make sure you have cranking fuel.
You can always hold a camera over the throttle body, if you feel it is safer....
Okay, after it wouldn't start anymore I recorded the prime shot (below), also cranking shots, then verified there was spark using a screw driver close to ground. It was a strong spark.
Getting desperate, I turned the idle screw inward a bunch to open the airway and it started! It idled about 3,000 RPM (ran logging) for about 20 seconds until it died. So experimenting I backed out the idle screw 1/4 turn, it started idled at ~2000 (ran logging) until it died ~20 secs. Backed out the idle screw another 1/4 turn it started, idled at 1500 (ran logging) until it died. Backed out again 1/8 turn, no start; backed out 1/8 turn, no start. Attached are a few pics and data logs.
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You have codes. Code list in members section
The error code I get is CTS High (24, P017) and I'm running version T198i; but, my handheld (no arrows around joystick) does not allow me to calibrate my temperature sensor from the PRO Tuning menu... the option isn't available to me and only goes to line 17. The "arrow" version handheld (shown from the instruction) apparently has this option.
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Send the request email for latest Software. The version I have has the CTS adjustment.