frozenrotors

Yes !

I would agree with trogdor as well. I chased down a similar problem(s) that took over a year to find. Same characteristics (high idle, running rich, pathetic gas mileage etc..) turns out after being told I had bent valves, leaking intake gaskets etc.. I had it hooked up to a smoke machine which is used in finding leaks in A/C systems. Fount a vacuum line leak in the back of the engine. The line connecting to the EGR valve was split length wise and was nearly impossible to detect by the naked eye.Once the smoke machine was blowing smoke through the entire intake and vacuum lines the leak was clearly visible. Cut a 1/2" off the line...problem solved! Saved about a $1000.00 in labor using 'old school' diagnostics. Hope you find the problem.

Are you still running it with a total static timing of 17 degrees?

I'm wondering if you plan on or why you didn't go with the Holley 2 Barrel set up? Have you or do you see any benefits to keeping the TBI set up?

What would be the most logical way of figuring out whats on there WITHOUT having to take everything apart? I'm trying to do this on Labor Day of all days and won't have access to a parts store. And it's my only vehicle. Would taking the engine number off the block tell me anything and get me the right part number or water pump? Thanks, Keith

Thought of him too. Unfortunately for me, he's on vacation or something.

Come to think of it. I think that motor came out of a 1989 or 1990 2 wheel drive pick up. The oil pans were different, the 4wd pan was obviously deeper than the one that was on the donor motor. Since none of the accessory parts were on the donor motor. Just came with heads, block and no intake. The water pump was on it, but all the pulleys were gone and had to come from the original motor. I guess I'm wondering what would be different on the water pumps? And would you know the size or part # of this by pass hose? Thanks, Keith

Does anyone know if there are any differences in water pumps from 1987- 1990 on the 3.0L VG 30 I. I replaced my engine a few years ago, and cant confirm what year the 'donor motor' came out of. The mechanic that did the swap said the new water pump on the old 'take out' engine would not fit. Now either he lied to me because he forgot to swap it or there is a difference between pumps. The other item I'm interested to know about is this 'coolant by pass' hose I've heard mentioned that is either attached to the water pump or somewhere near by. Apparently it can only be accessed while the timing belt, cover and water pump are being serviced or replaced. I need to do a water pump and am in the process of getting ready to order parts from Rock Auto. So any input or help would be greatly appreciated. Thanks, Keith

Was that in USD? LOL

Thanks. But isn't that for the idle speed? I am referring to a small screw, similar to what older single cylinder motorcycle carburetors had on them. It's located on the drivers side (left) as your facing forward in the drivers seat. At the bottom corner of the Throttle Body. Thanks,

Has anyone seen or experienced any benefits to adjusting this screw. Such as change in mileage or performance? I'm curious, because now that I've located and fixed 2 vacuum line leaks, I still get a bit of a rough-idle as it warms up. Coming down from fast idle, when it reaches about 12-1500 rpm's it starts to idle rough then as it continues to warm up and settles into full idle at 8-900 rpm it idles so smooth It's hard to notice it's running! Mileage hasn't been the best, but it's a significant improvement over where i was at 8 MPG. Thanks, Keith

Does anyone know here the thread is located that covers the topic of a 'Idle mixture screw' which is located. This mystery screw is located on the driver's side bottom in the back of the throttle body. I ran across the tread once before but can't remember under what topic it was on. Thanks, KM

Does anyone know here the thread is located that covers the topic of a 'Idle mixture screw' which is located. This mystery screw is located on the driver's side bottom in the back of the throttle body. I ran across the tread once before but can't remember under what topic it was on. Thanks, KM

Very good advise, I just failed to locate ALL of the lines and had 2 that were so well hidden that they leaked enough to cause some very frustrating idle and mileage issues.

I like that idea. Now all you have to do is implement a small pressure regulator to control line pressure. Thanks