WTF. Car keeps overheating?

killinprixs · November 10, 2008, 02:19:11 PM

good to know it was something simple! if you have the stock chip the car will cut out at 8 PSI but you shouldnt be hitting boost cut if the solenoid is hooked up correctly.

dogginred90 · November 10, 2008, 07:25:47 PM

I have a Kenny hot tune chip.

killinprixs · November 11, 2008, 01:43:14 PM

oops, didnt see that. The EGR hose is very easy to break, theres a flex sheild over it so its hard to see if its broke or not. That will make the car boost like crap. Is it loud under the hood? Any check engine codes come up?

dogginred90 · November 11, 2008, 03:16:32 PM

It is not loud. Yeah I know about that EGR tube I broke it before. I never fought a EGR like that in my life to get it back on. No SES light either. I am just happy it idles and doesnt stall all the time. It really doesnt run that bad. Just when I go WOT. With car I will take this anyday.

killinprixs · November 11, 2008, 03:26:04 PM

no kidding, btw where did you get a replacement egr pipe or did you repair it with something?

mfewtrail · November 11, 2008, 10:14:33 PM

Quote from: killinprixs on November 11, 2008, 03:26:04 PM
no kidding, btw where did you get a replacement egr pipe or did you repair it with something?

There are a few posts here about using the EGR pipe off one of the older 2.8 cars(not sure if it was w-body specific 2.8 cars or one of the other platforms though). I'm planning on eventually fabbing up a braided stainless line for the egr for my cars. I probably won't get around to that until I actually break one of the pipes though. :laugh:

dogginred90 · November 12, 2008, 10:21:09 AM

Yeah I just went to the junkyard and got on off a 2.8. It works just fine.

dogginred90 · November 15, 2008, 05:49:03 AM

Well update time again. I was just planning on putting my 91-93 overflow bottle in today, but that wasnt good enough for me. I had to try some tests out to narrow down my spit and sputter issue. Long story short took it for a quick run. Heard something pop and man did it run like crap. Idle was fubared AGAIN. just about gave up for about the millionth time. But for shits and giggles I changed my coils with ones from my GTP and wow she is running great no spit no sputter. Now I get to tackle that pain they call a transmission modulator vavle. Car runs great if I manually shift, but not when I have it in just OD. It sems to either slip or something, but if I manually shift it is fine.

GPChief · November 15, 2008, 01:09:52 PM

Quote from: dogginred90 on November 15, 2008, 05:49:03 AM
Well update time again. I was just planning on putting my 91-93 overflow bottle in today, but that wasnt good enough for me. I had to try some tests out to narrow down my spit and sputter issue. Long story short took it for a quick run. Heard something pop and man did it run like crap. Idle was fubared AGAIN. just about gave up for about the millionth time. But for shits and giggles I changed my coils with ones from my GTP and wow she is running great no spit no sputter. Now I get to tackle that pain they call a transmission modulator vavle. Car runs great if I manually shift, but not when I have it in just OD. It sems to either slip or something, but if I manually shift it is fine.

I got that overflow on my TGP, I like it.

As for your coils I don't know if it helps or not but I put some reflective tape on the back side of my COIL pack bracket where it attaches to the engine, thinking it may reflect some heat away from it.

Lastly have you ever had your tranny power flushed? IIRC when Kenny bought my old white TSTE he thought the tranny was slipping, then got it power flushed and it shifted just fine.

Keep the faith, eventually it will all come together.

Prospeeder · November 15, 2008, 06:37:01 PM

Dont power flush it, bad bad idea, what you want is called a fluid exchange, where a machine uses the transmissions pump to circulate the old fluid out on a tank and the tank of new fluid in its place, so every bit of fluid is changed, not Forcedm through the tranny, then they do a pan drop and filter change and your done! Had it done to my TGP, it started delaying when shifting, so i had that done shifts nice and quick again

dogginred90 · November 15, 2008, 11:54:36 PM

Thanks alot for the info. I will think about doing it later this week if this modulator doesnt work out.

GPChief · November 16, 2008, 01:09:47 AM

Quote from: Prospeeder on November 15, 2008, 06:37:01 PM
Dont power flush it, bad bad idea, what you want is called a fluid exchange, where a machine uses the transmissions pump to circulate the old fluid out on a tank and the tank of new fluid in its place, so every bit of fluid is changed, not Forced through the tranny, then they do a pan drop and filter change and your done! Had it done to my TGP, it started delaying when shifting, so i had that done shifts nice and quick again

I believe we are talking about the same thing, just calling it different names :icon_cool:

Typical Transmission Flush:

The typical flush machine connects to the transmission cooler lines. Several manufacturers make this machine and this is how it works. The machine carries new fluid to the line going to the cooler. There is a chamber on the machine with a diaphragm. The top part of the chamber above the diaphragm is filled with new fluid. The engine is started which turns the torque converter and the input shaft on the transmission. The input shaft turns the transmission pump creating hydraulic pressure which forces fluid to flow through the cooler line. As fluid leaves the cooler line, it enters the chamber on the flush machine. As the old fluid side of the diaphragm fills, it pushes the diaphragm up and forces new fresh fluid into the transmission. After a while, the old fluid is collected in the machine and it is replaced by new fluid. Now the transmission has been flushed. The machine causes no pressure and all fluid transfer is done by the transmission's own pump. The problem with this type of machine is that it does not remove all of the old fluid, but continuously dilutes the old fluid with new fluid. It never really removes all of the old fluid, but it is far superior to just a "drain and fill.

Pump inlet flush machine "Power Flush"

The pump inlet flush machine attaches to the pump intake after the pan and filter are removed. This machine supplies only fresh new fluid to the pump intake. As the new fluid passes through the transmission, it dumps into a collection tray and never goes back through for a second pass. All of the old fluid is GONE and replaced with fresh new fluid. After the service, a new filter is installed, the pan is replaced and then it is topped off with new fluid to the proper dipstick level. This process takes a total of about 20 quarts of fluid to flush out 15 quarts of old fluid and replace the fluid. It also gives the mechanic the opportunity to look in the pan for anything unusual that would indicate a pending failure. This type of flush does take more effort, makes more of a mess, and it costs a little more.

dogginred90 · November 16, 2008, 01:20:57 PM

Ok so I changed modulator valves today. It still stutters bad if I left it shift on its own. But if I manually shift it, it shifts good. But after a little run it doesnt downshift now. I hope I can keep it together over the winter. I will be looking to go 5 speed i n the spring I guess.

killinprixs · November 16, 2008, 05:04:04 PM

Is the T.V. cable good? Is there a check valve on the modulator? Ever change the filter/fluid? Does it downshift if you manually do it ? Did u adjust the modulator?

dogginred90 · November 16, 2008, 09:06:37 PM

TV cable does click when adjusted, yes it has a check vavle installed,fluid and filter was changed this past summer, yes it manual downshifts, I adjusted it to the left about 1 full turn total it didnt help. I will mess with it more tomorrow. It was downshifting for awhile after I installed the modulator then it just stopped after about 2 miles.