Air temp sensor?

Topic: Air temp sensor? (Read 1040 times) previous topic - next topic

Air temp sensor?

July 15, 2009, 10:59:33 PM

A couple months ago I replaced my AOD and converter. Then I had a local ler shop put new cat.converters on. Now when my car is cold it bucks and misses until it warms up but it ran fine with open exhaust. I replaced the following parts but it still bucks and misses when cold.
New Spark plugs, wires, map sensor, ignition mod., MSD cap, MSD rotor, and MSD coil.
Do ya'll thank it needs a air temp sensor, or maybe a temp. sensor? Or do ya'll think that the converters are maybe too small or just wrong for the car. I dont know what kind they are but they're 2".
Thanks guys.

Air temp sensor?

Reply #1 – July 17, 2009, 12:26:55 AM

run codes first. That way your not just throwing away money. It could be quite a few things that all add up into your problem, or something just might not be plugged in.

Air temp sensor?

Reply #2 – July 18, 2009, 04:14:48 PM

I installed a new air temp, and engine temp sensors. It runs better when its cold but it still isnt right. I guess I'll try to have my freind pull codes. I think its the catyltic converters. I've driven cars with clogged converters before and it feel just like they're clogged untill they heat up. which makes no sense to me because they're new. I was also thinking it might be O2 sensers or the ignation mod. I got maybe defected.
Im building an HO motor with GT40 heads for it and I want to get the car fixed before I install the engine. The engine should be finished by dec. I'll be sure to make a build thread.

Air temp sensor?

Reply #3 – July 19, 2009, 09:33:35 PM

Its fixed. The timing was retarded 8*. I set the timing at 12* and the bucking is gone.

Air temp sensor?

Reply #4 – July 19, 2009, 11:09:22 PM

So, you spent all that money on parts BEFORE you ran codes and checked timing??

Glad you got it sorted, but next time diagnose, don't throw parts at it.

Air temp sensor?

Reply #5 – July 20, 2009, 04:34:17 PM

The parts made the car run better but the timing is what did the trick. So its not like I just throw away money the parts needed to be replaced anyway. And Im not the sharpest tool in the shad but I dont beleave that running codes is going to tell you that your timing is retarded a couple degrees. Im sure that it was a combo of a few bad parts.

Air temp sensor?

Reply #6 – July 20, 2009, 06:08:14 PM

Quote from: Bruce M;282959

And Im not the sharpest tool in the shad but I dont beleave that running codes is going to tell you that your timing is retarded a couple degrees. Im sure that it was a combo of a few bad parts.

No it won't tell you diddly about the timing, but if there were no code(s) you could have looked elsewhere... Replacing a part that isn't causing a code, 99.9% of the time won't make one run better...

Air temp sensor?

Reply #7 – July 20, 2009, 08:05:22 PM

I just had to set mine from 12 to 9 to cure some issues.

Air temp sensor?

Reply #8 – July 21, 2009, 08:49:53 PM

I guess I should be more detailed. The only parts I replace after it started bucking and missing was the air temp, and coolant temp sensers (total $ spent $28). I listed the other parts so that you'll would know that they where most likely not the problem. I replaced them months ago when I tuned it up. I thought that the air temp and coolant temp where commin sense being that it acted up when cold.

Air temp sensor?

Reply #9 – August 12, 2009, 07:02:50 PM

Timing is wierd in these cars after i replaced my engine I had to set my timing to about 14* btdc to get it to run right on regular 87 octane!

Air temp sensor?

Reply #10 – August 12, 2009, 08:32:08 PM

Quote from: sarjxxx;286396

Timing is wierd in these cars after i replaced my engine I had to set my timing to about 14* btdc to get it to run right on regular 87 octane!

Keep in mind that many balancers aren't labeled properly. Old stock balancers wear out as well and the markings can get off.