Check engine light. - The Hull Truth

gofastsandman · 07-21-2009, 03:00 PM

1996 rude ex150exedb. Decarbed the 900 hr motor per your advice . Thanks. Never idled better.
New issue.
4 mos ago while running 3700 check engine light comes on. shut down. back in at 2000. got out the vacuum guage and worked back to pickup. pickup is 3/8 id alum notched on bottom for gremlins. replaced a1 line and bulb and line to motor.30 hr racor loaded w crap. 20 yr old tank. we got e10 in aug.....
sun. coming back in light comes on again. 2000 goes on. 1400 goes on. hello sea tow. thanks too. will get the vacuum guage out again. can I rebuild the vro if it`s not warped due to overheating? brp makes the parts , but don`t recommend it. ????
how do i test the vro, if i show only < 1 lb vacuum behind racor?
could the light be getting a false signal?
cheers,
sandy
no fac. manual will check the ersatz edition when home

gofastsandman · 07-22-2009, 05:59 AM

Less than 1 #vacuum on both sides of Racor.
GFS

A1 Outboard · 07-22-2009, 07:26 AM

You need to tee into the fuel line going into the VRO and check the vecuum while the engine is running. If the vacuum is below 5 inches and the light goes off, the problem may be the switch. The VRO has gone through many improvements through the years, so it is best to replace with a new one.

gofastsandman · 07-22-2009, 08:57 AM

ign. switch? i`ll put the guage on it tonight. my neighbors love me.

thx for the help!
gfs

gofastsandman · 07-22-2009, 12:40 PM

[quote=A1 Outboard;2423572]You need to tee into the fuel line going into the VRO and check the vecuum while the engine is running. If the vacuum is below 5 inches and the light goes off, the problem may be the switch.
The light did not go on at idle when i tested vacuum.
test the vro at idle?
could it be temp sensor by t stats? ground brown/blue wire and horn/light goes on.is the test no?
what about the fuel pressure sensor? Purple deal behind air cover? test procedure?
thanks again.
trying to get this right b4 lobster mini season next wed.
GFS

A1 Outboard · 07-23-2009, 08:09 AM

You can test the temp SWITCH by disconnecting them when the light is on. Switch works by grounding when temp is too high. Vacuum switch also works by grounding when vacuum is too high. I'm not sure what you mean by purple deal behind aiir cover. What color wires go to the purple deal?

gofastsandman · 07-23-2009, 03:34 PM

isn`t the vacuum switch purple. sorry i didn`t convey my thoughts well here. will test tomorrow. thanks for your patience.
GFS

gofastsandman · 07-24-2009, 02:51 PM

HiHo HiHo I need a VRO. Is it recommended to replace switch at same time. Again thanks for your patience
GFS
Think I`ll pick up any rpm wot?