Cdg2125

iTrader: (7)

So since my 00vi swap I've had some issues that have gone unresolved.

1. Tranny is still shifting hard but I believe it is due to the tps setting and the PF tb.
2. Car has a hard time starting
3.I have to hold the gas for a good amount of time or the car will stall

I didn't want to post these questions yet because I felt is was the cold doing some of this but now as the temp has increased and the issues were the same I'm curious.

1. I believe is caused because the PF tb is not closing like all the way. EX: when attaching the multimeter to the tps on my 98 tb the ohms is at .5. When throttle is opened it goes to infinite and then drops back down when I let go. With the PF tb the ohms do not drop once I let go. I am going to buy a new tb and hopefully that will solve that issue.
2. The car cranks for a while and then starts up. Didn't have this issue before the swap. Not sure what exactly would be causing the hard start. Figured it was the cold but it does it all the time now.
3. So after the hard starting the car stalls when it is cold. Even when I drive the car and then go inside a store or something, sometimes it will want to stall after start up if I don't hold the gas. Since it has been cold, when I start the car I most hold the gas at 1k rpm or it will drop right to 0 and stall. Again, I figured it was the cold but when the temps began to rise last week I still had the same problem.

My idle when warm is at 900rpms. I wasnt sure what would cause these problems because my idle is stable when warm. I can't open the IACV screw at start up or anything because then my idle will go up when warm. I need some help trying to fix these issues because I have to go to emissions in the next month and also want them fixed for summer. What can be the cause? Plugs? Coils? IACV screw? I know you'll say to check things but I want to know if you guys recommend a specific area that could cause this stuff. Thanks for helping if you can.

killerVQ30DE

Its not a fix BUT.. You can turn on you AirCon instead of holding the gas at 1000rpm... lazy mans fix (workaround)

speed racer

iTrader: (10)

Do you have an auto? With my setup I had to turn the screw on the TB just enough that when I let off the gas the car will continue to get air. The rpm's will drop but it will never stall which is what I was looking for. Also, the 4th gen IACV. Are your hoses far? It might be better to locate the IACV as close to the UIM as possible.

Cdg2125

iTrader: (7)

Yes I'm an auto. IACV is on the block that krismax made. Can't get it any closer to the UM. I tried to adjust the stop screw a while back but that messes up the idle rpms. If I adjust the stop screw to keep the tb open more can I adjust the idle with the IACV screw or will that mess things up again?

speed racer

iTrader: (10)

I'm not sure. I would warm up the car first to do any idle adjusting. First thing you should do is close the idle screw on the IACV with the TPS disconnected. Than adjust the screw on the TB so that the car is idling around 700 rpm. After this is done reconnect the tps and clear the code. This should stop the car from stalling when you are braking. Don't be scared if the rpms drop real low. You just want to make sure that it doesn't die on you when you brake which is most important.

Cdg2125

iTrader: (7)

the car won't die when I brake. If I start it and go to a red light right away the rpms will drop but the car will stay on. As long as the car is in gear it doesnt stall. I can't sit in park without holding the gas.

speed racer

iTrader: (10)

Ok, its the park position your talking about. You may have to set your idle higher than normal. Maybe someone else will chime in but I would try what I said previously and see what happens. May be trial and error.

Cdg2125

iTrader: (7)

ok I guess I'll have to try to set it high. Obviously its not getting enough air on start up so thats really the only option I could come up with before. I'll try it out tomorrow. Is it ok to adjust the IACV screw?

speed racer

iTrader: (10)

Of course. I'm thinking that you may want to do two options. Try closing the IACV screw and adjusting the TB screw to desired RPM. Than see how it reacts.

Than try opening the IACV screw all the way than adjusting the TB screw to desired RPM. After all is said and done see what type of results you get. If anything you may try a happy medium between the TB screw and the IACV screw.

Cdg2125

iTrader: (7)

thats what I'm hoping for. Between this and the tranny issue, car is driving me nuts haha. thanks for the help jason. I'll post results tomorrow.

btw: got the check and the muffler is ready to be shipped tomorrow morning.

andrei3333

so what did end up happening ? what r the results ?

Cdg2125

iTrader: (7)

wow this thread is old. Could have just pm'd me for the answer ha. Car is fine now. Ground wire broke in the tps harness so the ECU didn't get correct readings. As soon as that was fixed the tranny was fixed and the car starts fine. It's not cold anymore so I have to wait till then to see if symtoms come back but the car is fine for now.

cardana24

iTrader: (81)

since this thread got bumped up I'll ask a question too. Did you get the cold start problem resolved? When I start my 95 with the 00VI I have to push the gas and even when it gets warms it only idles around 500 rpm.

Cdg2125

iTrader: (7)

you need to adjust things. I already said in my other post, things are fixed now but it's no longer cold so I don't know how it will work in the cold. I had to hold the gas before even once the weather was nice, now I do not. I will assume the problems are fixed. I'd look to adjust things more on your car.

cardana24

iTrader: (81)

Oh, I did not see anything about you stating what you adjusted except for some wire on the TPS that was messed up causing you to have tranny problems. I was more curious what you "adjusted" in order to fix your idle.

Cdg2125

iTrader: (7)

the ground wire broke so the tps would short out and not send the correct reading. That was the problem. I didn't adjust anything. I said you might need to adjust things. At the time I had cold issues I opened the tb more and adjusted the IACV screw. You can need to fiddle with your car to try and figure out the problem. I have a PF tb so it may be different than yours too.

Curt

iTrader: (27)

This is a testament to "find and fix the problem" rather than work around it with a crutch (which is too frequently sought as the solution).