old school mechanics, step inside - Page 2 - ZR-1 Net Registry Forums

gbrtng · 05-01-2008

Quote:

Originally Posted by fred

On a Motorhome it's an outside chance, but you may want to check for a clogged cat/muffler.

Sounds suspiciously like a clogged exhaust to me too. Pull the pipes at the manifolds and run it open. Else find a pressure gauge and tap into the front pipe(s).

cuisinartvette · 05-01-2008

Another vote for vaporlock.

does the motorhome have the Lean burn system still on it? If so junk that crap and go aftermarket. The modules on those things arent the best .

WydGlydJim · 05-01-2008

It needs to be hooked up to a scope while presenting the problem. If it is the ignition module, it will be evident by the scope pattern. If you feel it is fuel, then you should be able to keep it running by squirting some carb cleaner into the throat of the carb, while it is presenting the problem, and it should correct somewhat and run while the scope pattern should remain normal. I have seen the sock in the tank also collapse, then relax, collapse, then relax, etc........

GrayZ · 05-01-2008

i spoke with a local old school mechanic today
he told me the coil inside the distributor
is probably my problem, he also said if that did not
fix it, that, it my be a timing chain as it backfires
a little through the carb, when it' starts to die.
thanks everyone for the great advice. i'm gona leave
no leaf unturned. got to get her ready for football season.

05-01-2008	#12
cuisinartvette Join Date: Aug 2005 Location: San Fernando Valley, CA. Posts: 896	Re: old school mechanics, step inside Another vote for vaporlock. does the motorhome have the Lean burn system still on it? If so junk that crap and go aftermarket. The modules on those things arent the best . __________________ 1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj.

05-01-2008	#13
WydGlydJim Join Date: Jan 2008 Location: Wichita, Ks. Posts: 319	Re: old school mechanics, step inside It needs to be hooked up to a scope while presenting the problem. If it is the ignition module, it will be evident by the scope pattern. If you feel it is fuel, then you should be able to keep it running by squirting some carb cleaner into the throat of the carb, while it is presenting the problem, and it should correct somewhat and run while the scope pattern should remain normal. I have seen the sock in the tank also collapse, then relax, collapse, then relax, etc........ __________________ 2009 LS9 1990 LT-5/sold/Bought my Baby back 1994 Lingenfelter LT-5/sold 1973 LS4/sold

05-01-2008	#14
GrayZ Join Date: Mar 2006 Location: Innsbrook, Missouri Posts: 1,727	Re: old school mechanics, step inside i spoke with a local old school mechanic today he told me the coil inside the distributor is probably my problem, he also said if that did not fix it, that, it my be a timing chain as it backfires a little through the carb, when it' starts to die. thanks everyone for the great advice. i'm gona leave no leaf unturned. got to get her ready for football season.