The exhaust gets cherry red when sitting idling and will barely tach
up or drive in gear(manual) . The cam/crank are in time as well as the
distributor. Cap, rotor, plugs and wires thrown at it with no luck.
Compression is within 10% of high and low cylinders. It has a ticking
noise that sounds like a valve out of adjustment but the valves are
not adjustable on this engine. The noise is not heard when the engine
is first started and the enigne will tach up quickly as normal but
after five minutes or so of idling, the ticking noise appears and the
engine will not tach up and exhaust gets red hot. Exhaust out the pipe
is clean and not black and does not smell overly rich. I've seen some
posts elsewhere mentioning distributor not advancing with engine rpm
making for a way retarded timing and red exhaust. I've seen injectors
mentioned too but I'm trying to figure out what the ticking noise has
to do with the driveability problem. Could a bad injector sound like a
valve out of adjustment? Timing chain, guides, sprockets and tensioner
replaced due to a broken slack side chain guide. Any ideas???? Thanks,
Will try the injector sound test tomorrow. I guess the loud clicking
could be an injector solenoid or two trying to close a stuck injector.
The truck will run fine for a few minutes with no clicking(sometimes)
but as soon as I hear the clicking..... very slow tach up and usually
won't go past 3000 rpms. The exhaust is not black like I would think
an overly rich condition would produce but I'll see if the clicking
noise is coming from an injector. Thanks for your time, no one.
The distributor is rotated for maximum advance as it is, maximum
counterclockwise. I haven't put a timing light on it yet but I need to
see if the distributor is even advancing at all. Might be dead. I have
a haynes manual, not the best, and it states that the 2nd notch from
the left(looking down at the crank pulley) is zero. I have rough set
the timing by turning the engine over until the 10deg BTDC notch lines
up with the pointer then rotate the distributor until the rotor lines
up with the number one plug terminal in the distributor cap. Will
check the distributor timing/function tomorow as well. Thanks for the
info, no one.
Get a light, someone probably installed it wrong as it should run like CRAP
and ping like crazy twisted full advance. The only time I've ever seen a
manifold glow red was when the timing was =real= retarded.
I've never seen an iron manifold glow red under ANY circimstances! My
best gues is your converter is clogged to the max. The ticking sound is
probably an exhaust leak that you only hear when the back pressure is
I did have this problem on my Honda. I got some strange noises like
ticking when the converter choked up and it popped the joint between the
head pipe and the converter.
I'm guessing you're also down on power too.
no email@example.com wrote:
I'm going to try and get back on the truck this afternoon or tomorrow.
Yes, the truck is way down on rpms when the ticking is heard. When
first started or when no clicking noise is heard the truck will rev to
6000 or so then only to 3000 or so when the clicking/red exhaust
appears. I'm going to check to see if the distributor is advancing
first then maybe check the convertor for color change as well. When
the chain was replaced, the crank key was straight up per the Haynes
manual(not the best), the cam sprocket pip mark parallel to the cam
cover mount(3 o'clock position facing the engine) and the oil pump
indexed so the distributor rotor was pointing to #1 cylinder. The
engine was not moved when the old chain was removed so the cam/crank
mechanical timing should have been close. I originally hoped this was
the problem but the ticking was there before and after the chain
replacement so I need to look somewhere else, like the exhaust system
itself. The chain was replaced because of broken chain guides. The
truck did have a broken off O2 sensor that was replaced with an O2
sensor the owner provided. I believe when he drove it over it would
barely get up the inclined driveway I have so it probably had the red
exhaust then but it could not be seen in the daylight. It did have the
ticking noise which sounds like a collapsed lifter on #3 or #4
cylinder and it would barely idle. The exhaust is looking like the
culprit. Thanks for the info, no one.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.