1994 q45 please help me stalls at 4,000 rpms

[mniceguy18]

Hey i did the sparkplugs and noticed the knock sensors where all cracked up so had to get new ones then put it all back together andit barely starts when it does its at like 300 rpms and if it hit the gas it stallsor when it starts fine it redlines at 4,000 rpms wont go overi replaced the t.p.s but did not helpand if it let go of the gas it normally stalls when i press it again i have to put a foor on the brake and one on the gas please help me

[maxnix]

Vacuum leaks?

Definitely an error in reassembly, but who knows what and how many besides you?

[mniceguy18]

its acually a q45 t

[mniceguy18]

yeah probibally thanks i hate things like that because you have to retke it all apart

[maxnix]

Sad but true.

[qship96]

Why Qtech states more Q are bar-b-qued by inexperienced owners and incompetant techs than old age

[stupidwhiteguy12]

wow, i have the exact car. and at one time, when it still worked, it would do the same thing, and would only stay running if i held on the gas.

if this is the case, look around at your hoses that go from the air filter all throughout the intake and what not. one of my was barely hanging. I got that fixed, and it ran perfectly fine.

so chances are, it's an air leak somewhere. might have to take some stuff apart, but it should be easy to find. all you really have to do is have someone in the car keeping it running, and have the other under the hood listening for the leak.

sorry if it's not clear lol, i'm not sure what everythings called, but hopefully this narrows it down.

[goody90q45]

if this is the case, look around at your hoses that go from the air filter all throughout the intake and what not. one of my was barely hanging. I got that fixed, and it ran perfectly fine........so chances are, it's an air leak somewhere..........

Ditto. I did the same thing once putting the plenum back on the 90Q. In my case I forgot to hook up the 3/4" hose below the air tube.

Retrace the positive crankcase ventiltion with a flashlight (all the larger 3/4" hoses) looking for loose connections or cracked hoses. The two hoses attached below and above the air tube feed back to the valve covers and the PCV valve (did you clean it?). I've had to replace the small hose coming directly off the PS valve cover due to splitting. Check it closely. If any one of these hoses are loose or cracked it will cause the symptoms you describe. Are the IAC valve hoses on tight?

[mniceguy18]

damn why could you two reply the day i posted lol i dropped it at a mechanic i had to drive it their with one foot on the gas and one on the brake i think the cat converter was clogged too because it was red hot up to it when i got their thanks for the help i will prob end up doing it myself just because how exspensive mechanics are just wanted a quote from the guy

[Infinitiguy19]

What was "red hot" the engine or catalytic converter?

Did you measure the temperature of the engine with a Consult or near equivalent?

What was the temperature of the Catalytic converter with a non contact thermometer.

[mklandrieu]

reset the computer.

[elwesso]

how did you notice the KS were cracked after doing the spark plugs? you cant even see the KS unless you take the Y shaped coolant thingy off...

[maxnix]

how did you notice the KS were cracked after doing the spark plugs? you cant even see the KS unless you take the Y shaped coolant thingy off...

Picky, picky!

I don't understand how one could drive a car in that condition anywhere without repairing it first.