Holley EFIWhen I hot start my engine, it “diesels” while the dual sync is syncing with the ECU. What resolves this? Bigger prime shot? Smaller? Something else?
Junior Member
Engine “diesels” during hot start.
When I hot start my engine, it “diesels” while the dual sync is syncing with the ECU. What resolves this? Bigger prime shot? Smaller? Something else?
Administrator
It's often necessary to turn the ignition key on, wait for the WBO2 sensor to display AFR, then start
the datalogger & engine. This allows you to determine if the engine AFR is excessively rich or lean.
Hot starting issues are usually Cranking Fuel related (as long as the idle speed screw/IAC Position % relationship is properly adjusted).
Ensure the idle speed screw on the throttle body, adjusted to achieve an IAC Position of about 5% at hot idle.
If you take the time to study this, you'll be a startup tuning expert:
http://forums.holley.com/showthread....6254#post36254 (Good Starting Advice Thread - Especially posts #2, #4 & #6.)
Read the "TIP" in post #6 of this thread:
http://forums.holley.com/showthread....6254#post36254 (Good Starting Advice Thread - Especially posts #2, #4 & #6.)
May God's grace bless you in the Lord Jesus Christ.
'92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.
Junior Member
Thanks, Danny.
Administrator
You're welcome.
May God's grace bless you in the Lord Jesus Christ.
'92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.
Posting Permissions
Reply With Quote