Search found 13 matches

by heady2010
Sat May 30, 2020 6:22 pm
Forum: Diagnostic discussion
Topic: How many degress out is a problem?
Replies: 6
Views: 5936

Re: How many degress out is a problem?

Thank you Steve!
by heady2010
Thu May 28, 2020 9:24 pm
Forum: Diagnostic discussion
Topic: How many degress out is a problem?
Replies: 6
Views: 5936

Re: How many degress out is a problem?

I am at a main dealer, can't say which due to "politics".

Maybe more so what I should be asking for is examples of where people have had problems with cam and crank being out of sync, and how many degress were they out. I am just trying to build an understanding of when to invetsigate.
by heady2010
Thu May 28, 2020 8:31 pm
Forum: Diagnostic discussion
Topic: How many degress out is a problem?
Replies: 6
Views: 5936

Re: How many degress out is a problem?

Most of the vehicles that come my way have been "fixed" by the recovery company so no codes unfortunately.
by heady2010
Thu May 28, 2020 8:19 pm
Forum: Diagnostic discussion
Topic: How many degress out is a problem?
Replies: 6
Views: 5936

How many degress out is a problem?

Hi all, When comapring cam and crank signals to a known good, how many degress of difference is cause for concern? I have found that comparing known good vehicles that are brand new to ones that have covered more miles (but with no problem) to be slightly different, i assume due to belt/chain/compon...
by heady2010
Sat Feb 10, 2018 10:17 am
Forum: Diagnostic discussion
Topic: CAN message meaning.
Replies: 3
Views: 5492

Re: CAN message meaning.

Hi Phil, Thank you for the reply, I will carry out some tests soon, I'm hoping that I will be able to identify the brake signal. My next question is, if I isolate the brake circuit by cutting the brake signal wire before the abs computer for example and apply a direct feed into the computer so no ot...
by heady2010
Thu Feb 08, 2018 9:16 am
Forum: Diagnostic discussion
Topic: CAN message meaning.
Replies: 3
Views: 5492

CAN message meaning.

Good Morning, I have a vehicle which I think is sending a brake apply message out on the multiplex without driver (it isn't the brake switch circuit causing the issue) My question is, is it possible to find out what a brake apply signal looks like if I link my scope to the brake switch and the multi...
by heady2010
Sun Jul 30, 2017 9:03 pm
Forum: Diagnostic discussion
Topic: Firstlook sensor to measure timing.
Replies: 7
Views: 9203

Re: Firstlook sensor to measure timing.

That sounds like a good relationship test and would be interesting to see, I don't have a a wps, but if I did it would be good to use it on a good engine, mark the valve events in relation to the crank signal, then carry our the same tests with a FLS in inlet and or exhaust but with the wps removed ...
by heady2010
Sun Jul 30, 2017 8:10 pm
Forum: Diagnostic discussion
Topic: Firstlook sensor to measure timing.
Replies: 7
Views: 9203

Re: Firstlook sensor to measure timing.

Hi Richard, Thanks for the reply and information. Yes as you say I would be using the degree rulers to highlight the 720 degrees of crank rotation. I don't have a specific car that has a fault, just thinking of building a data base. All of this of this is new to me so im probably over thinking a lot...
by heady2010
Sun Jul 30, 2017 3:23 pm
Forum: Diagnostic discussion
Topic: Firstlook sensor to measure timing.
Replies: 7
Views: 9203

Firstlook sensor to measure timing.

Hi all, Does anyone have any details of how you could carry out a timing check just using a first look sensor and not a wps? I'm guessing a good overall view would be on a known good engine to carry out a cranking check first and have one sensor in the intake and another in the exhaust along with st...
by heady2010
Sat Feb 28, 2015 8:11 pm
Forum: PicoScope 6 Automotive software
Topic: Abnormal voltage spikes
Replies: 1
Views: 10171

Abnormal voltage spikes

high spike.jpg Hi, when i'm measuring signals i keep getting very high voltage spikes when the car is running (see image of battery voltage) i'm guessing it might be from ignition system? I am making sure the cables aren't running near the coils and i've also got a second channel going to earth whi...