Hey there Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Bret
Yoda
Offline
My Garage
Gastester vs. Colortune revisited – A status report.
Otherwise know as how to get your 78 MGB to pass California’s tough smog test.
For those of you who might be curious – due to a few setbacks I am still in the starting gate of my evaluation of the Gunson Gastester and the Colortune devices. But while I am not as far along as I’d like to be right now – fear not I have made positive headway. To date most of the issues I am currently dealing with are the result of years of neglect thanks to previous owners, coupled with a backyard mechanic who hasn’t had to do this much work on one of his own cars in years.
Main trouble spots encountered thus far:
1) Vacuum leaks: Too many hoses, tubes & gaskets to name.
2) Exhaust leaks: As stated in another posting, Manifold to Catalytic Converter Gasket leak.
3) Catalytic Converter Blown out. Discovered this while addressing the exhaust leak – I have a new Cat on order and should have it by the weekend.
4) Smog devices: Air pump & rail, gulp valve and the EGR valve etc. I have had to do various tests spelled out in the Bentley manual to make sure that they are functional.
These delays have allowed me to get familiar with the Gunson devices. Early findings thus far seem to favor the Gastester. This is due in part to the fact that both my shop manuals support the gas analyzer in their procedures. This is significant point to me - in that I need to have my 78B smog tested next month and the more detailed information found in the manuals would seem to be a necessity for that reason alone. But I will not sign off on this at this point.
On that note I seem to have inadvertently found another comparison test between my two shop manuals. Those being the Haynes and Bentley Shop Manuals. But that’s for another day.
Bret
Gastester vs. Colortune revisited – A status report.
Otherwise know as how to get your 78 MGB to pass California’s tough smog test.
For those of you who might be curious – due to a few setbacks I am still in the starting gate of my evaluation of the Gunson Gastester and the Colortune devices. But while I am not as far along as I’d like to be right now – fear not I have made positive headway. To date most of the issues I am currently dealing with are the result of years of neglect thanks to previous owners, coupled with a backyard mechanic who hasn’t had to do this much work on one of his own cars in years.
Main trouble spots encountered thus far:
1) Vacuum leaks: Too many hoses, tubes & gaskets to name.
2) Exhaust leaks: As stated in another posting, Manifold to Catalytic Converter Gasket leak.
3) Catalytic Converter Blown out. Discovered this while addressing the exhaust leak – I have a new Cat on order and should have it by the weekend.
4) Smog devices: Air pump & rail, gulp valve and the EGR valve etc. I have had to do various tests spelled out in the Bentley manual to make sure that they are functional.
These delays have allowed me to get familiar with the Gunson devices. Early findings thus far seem to favor the Gastester. This is due in part to the fact that both my shop manuals support the gas analyzer in their procedures. This is significant point to me - in that I need to have my 78B smog tested next month and the more detailed information found in the manuals would seem to be a necessity for that reason alone. But I will not sign off on this at this point.
On that note I seem to have inadvertently found another comparison test between my two shop manuals. Those being the Haynes and Bentley Shop Manuals. But that’s for another day.
Bret
A friendly reminder - be careful what links you click on here. If a link is posted by someone you don't know, or the URL looks fishy, DON'T CLICK. Spammers sometimes post links that lead to sites that can infect your computer, so be mindful what you click.