Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Herky-jerky hot/cold starts 2003 Prius. Missing? CEL

orange4boy · 07-16-2011, 05:31 PM

It had to happen sometime. Engine light on. No away to get code. Still running though.

The Pri has been missing sometimes when cold and when restarting from hot. The missing dissapears when you get on the throttle and once you drive a short way. The CEL finally came on after a couple of months of this. ( I know, shoulda checked it earlier )

I pulled the sparkplugs (NGK iridium) and found one boot with signs of jumping. Re-gapped to .044" and put her back together with some vaseline. Cured it for a spell. Didn't have access to Dielectric grease. Now its back again and the CEL lit up yesterday.

My guessses so far:
Bad/dying coil
High resistance sparkplug
Old boot still allowing jumping

looks like I'm in the market for one of those home brew code readers.

07-16-2011, 05:31 PM	#1 (permalink)
orange4boy Master EcoModder Join Date: Aug 2008 Location: The Wet Coast, Kanuckistan. Posts: 1,275 The Golden Egg - '93 Toyota Previa DX 90 day: 31.91 mpg (US) Chewie - '03 Toyota Prius 90 day: 57 mpg (US) The Spaceship - '00 Honda Insight Thanks: 100 Thanked 306 Times in 178 Posts	Herky-jerky hot/cold starts 2003 Prius. Missing? CEL It had to happen sometime. Engine light on. No away to get code. Still running though. The Pri has been missing sometimes when cold and when restarting from hot. The missing dissapears when you get on the throttle and once you drive a short way. The CEL finally came on after a couple of months of this. ( I know, shoulda checked it earlier ) I pulled the sparkplugs (NGK iridium) and found one boot with signs of jumping. Re-gapped to .044" and put her back together with some vaseline. Cured it for a spell. Didn't have access to Dielectric grease. Now its back again and the CEL lit up yesterday. My guessses so far: Bad/dying coil High resistance sparkplug Old boot still allowing jumping looks like I'm in the market for one of those home brew code readers. __________________ Vortex generators are old tech. My new and improved vortex alternators are unstoppable. "It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.