{youtube}NXrd1fYwj1o|615|345|0{/youtube}
A common problem on these second generation GM fuel injectors. (Multec 2) They would mechanically stick closed and cause an intermittent misfire. I cannot tell you how many of these I have run across, where the customer already replaced all of the ignition components in an attempt to fix the misfire. There are multiple ways to identify a no fuel misfire. In this video we will cover a few of them. In the related videos posted lower on the page, I will cover more.
Engine Performance Diagnostics chapter 17 page 20-23
- intermittent misfire
- check engine light (P0300)
- clean or replace sticking fuel injector
- injector sound test
- secondary ignition waveform of a no fuel misfire
- injector voltage waveform showing a missing pintle hump
- misfire counters on a scan tool
- scan tool
- lab scope
- secondary capacitive pick-up
- back-probing tool
end faq
{accordionfaq faqid=accordion15 faqclass="dotluvfaq help2 aligncenter headerbackground headerborder contentbackground contentborder round7" active=item0}Playlist
(Chapters 17, 18 and 19) Fuel Injector Testing
Related videos:
How to test a fuel injector (open winding case study) Nissan :
{youtube}mmRhcVkJdeQ|615|345|0{/youtube}
How to identify injector flow problems (Toyota 1.8L) part 1:
{youtube}ZnFSUNjwDPQ|615|345|0{/youtube}
How to identify injector flow problems (Toyota 1.8L) part 2:
{youtube}85nMC6xIfUg|615|345|0{/youtube}
Secondary Ignition Waveforms (common faults):
{youtube}SUShO72Grq8|615|345|0{/youtube}
Identifying type of misfire using tailpipe emissions:
{youtube}Uzmoyo00VpE|615|345|0{/youtube}
end faq
{accordionfaq faqid=accordion3 faqclass="darkhivefaq defaulticon headerbackground headerborder contentbackground contentborder round5" active=item0}
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.
Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium. There is a 14 day free trial.
On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!