New start-up help

[V6DVette]

Well some bad news. On someone heres recommendation I did a compression test. #4 comes up short. Like 50lbs. Pulled the valve cover and looks like the push rods are ok. So looks like I'll be pulling the head off.   

[daveismissing]

Ouch. Well at least you know.
Funny- when my car was maybe 5 years old I took it in to the (large city) dealer for service and they sent the injectors out to a diesel shop for cleaning.

[Just a Six?]

Way back about 91ish I picked up 10+ feet of about 3/8th copper tubing & wrapped it tight around the up pipe. Made a cold can that went where the battery sits & filled it with ice. Man some of the Tech guys would look at me and say WTF is that supposed to be?
I still have it hanging on the shop wall. 
[size=78%] [/size]

[V6DVette]

Ouch. Well at least you know.
Funny- when my car was maybe 5 years old I took it in to the (large city) dealer for service and they sent the injectors out to a diesel shop for cleaning.

Utube, a 9 volt battery, some hose & clamps and a can of carb cleaner. Took longer to pull the injectors.
The guy at the diesel shop seemed disturbed that I even asked.

[TexasT]

Well some bad news. On someone heres recommendation I did a compression test. #4 comes up short. Like 50lbs. Pulled the valve cover and looks like the push rods are ok. So looks like I'll be pulling the head off.   

Did you put some oil in and retest. Could be a stuck ring. You did say it has been sitting.

[Scoobum]

I agree with Rich. I'd fire it up with the new chip  and let it get some run time before I'd pull it apart.

[V6DVette]

I agree with Rich. I'd fire it up with the new chip  and let it get some run time before I'd pull it apart.

 I did squirt some oil in. Didn't make any difference. But how much is needed? I used maybe 2 table spoons. Could be a stuck valve I guess too.

[Scoobum]

With it sitting so long maybe a ring or valve sticking? Just guessing it may be gummed up a bit. Transmission fluid is high in detergents. Maybe dump a litre...sorry it's a Canadian thing...out of the pan and drop a litre of trans fluid in. Let it get up to temperature for a few minutes.

[V6DVette]

Can't hurt anything at this point I guess. I hate thinking about pulling the head since the car is still on jack stands I have to work standing on a milk crate.

[Steve Wood]

Yeah, I was wondering if it might have something like a collapsed lifter or such....With the covers off, you can get some one to turn the engine over while you watch each valve to see if it is going up and down and also watch the lifters to see if the center portion/plunger is moving downward instead of the entire lifter moving.

Before doing this, start it for a moment to make sure the oil pressure fills the lifters.

Before taking it apart, I would like to see if you can get it to run more or less right.  Otherwise putting tranny fluid in the oil will be less than beneficial as it needs to run for awhile.

[V6DVette]

Good idea. I'll wait till the chip gets here.

[V6DVette]

 So the chip is in. Engine still runs rich and will only start with part throttle. Wont idle unless the vac line is pulled from the regulator. (getting air from that ) Tried adjusting the IAC screw but can’t open it enough to keep the engine running without pulling the vac line off the regulator. The IAC valve is new (20 years old..but new…lol) I removed it just to inspect it. I suspect its bad. Is the pintle suppose to move in and out easy or not? I measured its length cold and then warm. Seemed like it only moved a few thousands in. The other thing I noticed was the IAC count starts at 175 and stays there. Wont go down on idle till I pull the vac line off and the RPMs rise. Then it goes to “0”  So even if the  IAC is ok, how would it back off if the count stays at 175? I believe the thermostat is reading right as the fan comes on at  160~. I read that the count should be 140 at crank and down to 108 at start. What could cause my count to be so high to begin with? Is this what could be causing the engine to run so rich on start up?
I haven't looked but I bet I need to change the plugs again. 
 

[Scoobum]

Erics preset is 140...when you first start it it drops to 108...and then will go to 70-90...then gradually fall as the engine warms up...and then fall between 10-20. As far as I know the ECM sets the RPM from the coolant temperature sensor and the IAC does its thing.

New 02 sensor...good MAF...no air leaks...fuel pressure set to 43...Translato r set correctly...it shouldn't be running rich.

[reality]

Why would the fan be coming ON at 160? maybe that will lead you to a solution if the engine never warms up.

[Scoobum]

Why would the fan be coming ON at 160? maybe that will lead you to a solution if the engine never warms up.

Eric has the fan come on at 166...that's not his issue.