No Timing
Moderators: jsmcortina, muythaibxr
Re: No Timing
Thanks Lav1000,
after writing the last post I went out removed the rocker cover and spark plug and found that the exhaust valve was opening as the piston was coming UP and stayed open as the piston went down!
I thought I put the crankshaft back as I found it but it appears I did not, though the timing marks lined up.
I will whip of the timing cover and see what I can find.
Thanks again,
Doug
after writing the last post I went out removed the rocker cover and spark plug and found that the exhaust valve was opening as the piston was coming UP and stayed open as the piston went down!
I thought I put the crankshaft back as I found it but it appears I did not, though the timing marks lined up.
I will whip of the timing cover and see what I can find.
Thanks again,
Doug
http://dggt6.blogspot.com.au/ Memoirs of a Megasquirt Triumph.
Re: No Timing
Make sure you have the right OEM specs on this.
On some engines you have the situation that the outlet valve is stil open when the inlet valves opens.
There is a reason for this.
They use speed of the exhaust gas to suck the fresh air fuel mixture in.
On some engines you have the situation that the outlet valve is stil open when the inlet valves opens.
There is a reason for this.
They use speed of the exhaust gas to suck the fresh air fuel mixture in.
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- Super MS/Extra'er
- Posts: 1986
- Joined: Sat Jul 22, 2006 8:02 pm
- Location: Eureka, NV USA
- Contact:
Re: No Timing
Just a little thing called "camshaft overlap"...................LAV1000 wrote:On some engines you have the situation that the outlet valve is stil open when the inlet valves opens.
There is a reason for this.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
Re: No Timing
Your right Ken, and it is not so little.
It is a huge thing in tuning and exhaust systems.
It is a huge thing in tuning and exhaust systems.
-
- Super MS/Extra'er
- Posts: 1986
- Joined: Sat Jul 22, 2006 8:02 pm
- Location: Eureka, NV USA
- Contact:
Re: No Timing
Correct! I was just being facetious!LAV1000 wrote:Your right Ken, and it is not so little.
It is a huge thing in tuning and exhaust systems.
Ken
1979 Corvette - 383 CID SBC w/ Holley Pro-Jection 900 CFM TBI, 4-85 lb lo-z injectors & Walbro 255 pump
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
MS2 v3 w/extra 3.4.2 Release
36-1, Delphi LS2/7 coils in wasted spark, driven by v2.0 logic board from JBPerformance
Spartan Lambda Sensor from 14point7
TinyIOX from JBPerformance
Re: No Timing
If your cranking compression is good the cam timing can't be so far off it won't run.
Looking at where the intake valve closes is (a better guage) a little less of a grey area as this determines your dynamic compression.
The EDIS has complete control of your ignition, the EDIS will make sparks even with the MS unplugged.
Your no spark fault is with the EDIS or its supporting systems.
Looking at where the intake valve closes is (a better guage) a little less of a grey area as this determines your dynamic compression.
The EDIS has complete control of your ignition, the EDIS will make sparks even with the MS unplugged.
Your no spark fault is with the EDIS or its supporting systems.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
Re: No Timing
SOLVED!!!
It was "the old EYE DEE 10 T " problem. More commonly known as the IDIOT symptom.
The cam and crank sprockets were aligned, but 180 degrees out (backwards?). I was pedantic about re-aligning the sprockets but totally forgot to check which part of the 4 stroke cycle the cam was on.
Thank you everyone for your assistance.
Now back to fitting the O/D gearbox installation project that started all this 7 months ago!!!!!!
It was "the old EYE DEE 10 T " problem. More commonly known as the IDIOT symptom.
The cam and crank sprockets were aligned, but 180 degrees out (backwards?). I was pedantic about re-aligning the sprockets but totally forgot to check which part of the 4 stroke cycle the cam was on.
Thank you everyone for your assistance.
Now back to fitting the O/D gearbox installation project that started all this 7 months ago!!!!!!
http://dggt6.blogspot.com.au/ Memoirs of a Megasquirt Triumph.
Re: No Timing
Thanks for the feedback, we all make mistakes.
Thats why we know so much!
Thats why we know so much!