Does the oil itself look fairly clean on the valvetrain and on the dipstick? Or does it resemble the catch can crud? If the oil is filthy, sounds like its time to do an in-situ engine crankcase cleaning. Put a NEW filter on the engine, and change the oil to something like a 10W-40 or 20W-50 and in p...

I'd try driving it with the PCV blocked off to see if any affect is made there. Put the valve cover dump into a can or bottle while you drive to catch the contents that come out to see if maybe oil splash and a missing baffle could be part of the cause? Also, that PCV tube sound to be too small, whi...

Sarge...

Also might want to check your PCV valve and hose to make sure you are not pulling oil into the intake through that system.
I have seen a stuck open PCV valve that gives similar symptoms to what you are showing (less the hard cold start).


H. Dozier

Jinx... You need to post the link. The search feature of this forum does not work, and only gives an error message of "The specified search backend doesn’t exist" as a response. Also gives the same message after you post a reply as well. The administrators need to look into this and see if...

I am getting the same error message.
Something in the search part of the database software is really "effed" up!

Can you state again what the diameters (and lengths) of the fuel line TO the engine and the return line FROM the pressure regulator are? Also, do they vary in diameters along the runs? Reason is that the fuel pressure should go UP when intake vacuum goes towards atmospheric or above (with hose on va...

If you are cleaning the block, be sure to remove all the plugs before it goes into the marinade, and afterwards high pressure blow out all passages, plus then gun brush the oil galleries until they come out with no residue. Another thing is after you deburr and clean you can paint the inside of the ...

Tommy..... To reach redline cold you have to have three things. 1) Fuel to the engine (injectors) 2) Spark to the engine (ignition) 3) Air to the engine (throttle) - a LOT. The engine is basically an air pump. If you restrict airflow, then the engine is starved for the oxygen needed for combustion, ...

If you have access to an oscilloscope, a knock sensor or accelerometer and a variable DC power supply you can measure this yourself. You should really also have fuel pressure against the closed injector to get an accurate reading, as this will influence the opening time. So also have the injector in...

Have a question about how the cooling fan circuit on the late (89661-1A190) ECU used on 93.5 and up Silvertop Manual trans engines works. The fan switch seems to be a normally "closed" switch which opens above a temperature (~92ºC). It runs through the AC "trinary" pressure/tempe...

Interesting that only one type head is listed. I swear that I saw a picture once of an early and late Silvertop head that showed the early head had the upper injector opening somewhat more "pinched" in the port. If so, that would have more emulated the intake manifold profile except not sh...

Good pictures of early (top link) versus later (top piece bottom link) intake manifolds. However, I am looking for the cylinder head pictures that shows the mating surface that these intakes attach to. I know they are out there, just haven't found them yet. If anyone has photos of the cylinder hear ...

Somewhere on this or maybe another 4AGE forum there was posted a picture of the early (1991 up to 1993.5?) Silvertop intake port face versus the later (post-93.5?) intake manifold port face. There seemed to be a substantial difference in the shape of the ports at the flange IIRC. If anyone here know...

The induction system is a resonance tuned system, and includes the lengths/diameters of the individual runners calculated from the back of the valve seats to the end of the trumpets of the individual intakes for each cylinder, plus the volume of the plenum that encloses the trumpets all the way back...

If you are worried about degreaser residue, then go over the sealing areas with a cloth soaked in Brake Cleaner (or use Acetone).
This will clean and dry the surfaces for the FIPG material.

All O2 sensors, whether narrow or wideband, want to have as vertical a mounting as possible so that water cannot collect and freeze in the sensor head.
Mounting this way makes them self-draining.

Try these guys.....

http://products.worldwidemetric.com/vie ... c-parallel

firstly i want to thank you for your analytic post. Secondly i didnt understand all the thing that you wrote cause i have 100% knowldegde at mechanical and physics :) how exactly should i know my gazoline stoichometric ? i am using here in Greece 100 octane unleaded fuel , i have recently rebuild m...

I am trying to understand if the factory specs is equal to a specific lambda value and all together to an optimum afr. If you are looking for theoretical "best specifications" for A/F ratio on an engine , it is defined as "Minimum Best Torque" for the engine, which is the leanes...

Just re-pin the connector for one that fits. Any 90's toyota 4 wire O2 will work I am going to disagree with this to a small degree. O2 sensors actually have different heat outputs relative to how close they are to the heat source. An AW11 O2 that is 3' from the head will heat less than an O2 senso...

The two piece aluminum pan with steel sump from a 7AFE engine will definitely fit as well.
Get the pickup for the 7AFE along with the pan as depth is slightly different.

I researched this a while back for a Silvertop into a Lotus Europa.

Ethanol (E85), like methanol fuels, is both dipolar and corrosive. By diplolar I mean the fuel itself can carry a static charge and therefore can electrically "etch" components, especially if they present an opposite electrical field due to wiring. So certain things have to be considered i...

Find a 2006 GMC or Chevrolet pickup for a Z code 5.3L engine, which is the L59 flex fuel engine, and use the following table : Stoichiometric AFR vs. % Alcohol In Fuel % Alcohol / AFR 0.0 14.7 6.25 14.3 12.50 14.0 18.75 13.6 25.00 13.3 31.25 12.9 37.50 12.6 43.75 12.2 50.00 11.8 56.25 11.5 62.50 11....

You might try and see if an oil filter gasket might work.

LP = Large Port
SP = Small Port

Large Ports were early 4AGEs with the secondary intake tuning plate assembly to cut off one of the runners in the intake manifold.
The Small Port engines did not need this device and dispensed with it.

dr.occa wrote:Phil, your name sounds so familiar.

Dr. Occa...

Maybe you heard of Phil from HERE?

http://home.clear.net.nz/pages/phil.bradshaw/Index.htm

Phil has a great background in transplants and conversions of Toyotas.
Also great info on adapting EFI on engines.......

If you wish to ascertain if the previous owner did a good job (or had done by someone else), then yes, you can use an LC-1 to monitor and record the A/F at the exhaust to see if there are any overly rich or lean spots. You could then use that information, along with recorded MAP, RPM and TPS to look...

Maybe the P.O. was running the system in an open loop mode?

If you know or have a good idea of what the opcode map is for your 68xx variant controller, you can utilize a cross-platform disassembler to generate the code base that the micro was using. IDA-Pro is a good example, although not the only one and some I think could even be freeware or shareware. The...

Not familiar with a Motorola 8600 microprocessor.

Would that be instead a Motorola 6800 series variant, such as 6801, 6803, 6809, etc?
If so, its similar to what both GM and Chrysler used in the late 80s and early 90s.........