91ChevyRS

I don't know why it came on.

The cap is on securely and I seated the rotor as best as I could on the shaft itself...

Anyway, there was one thing I forgot to do. I didn't disconnect the negative battery cable as instructed by the Haynes Manual, should I have done that in the first place?

Can I do it now and reset the computer or no?

Car is showing no signs of trouble, last time it threw a code, it was code 34 I believe and it had to do with the EGR valve. I replaced the EGR valve and the solenoid.

Any ideas?

'Shifter

iTrader: (2)

It won't hurt anything to disconnect the battery now, but it may help.

camaronewbie

Only way to know what's up is to get a paperclip and get the new code and look it up.

91ChevyRS

Alright I did the paper clip method and here is what it flashed.

If I am reading it right it flashed a code 20 and a code 30....

What this is......I have no idea...I believe a code 20 is a fuel pump voltage is high....which makes no sense...

I'll try this again and see if I can get anymore codes...

EDIT: Code 22 sorry, I didn't read it right, I believe its flashing a second code after 22, but I cant quite catch it...

code 22, is a TPS...what's TPS stand for? And the second code is a Code 32...which is my EGR....or my MAP sensor. It wouldn't make sense if it was my EGR cause its only 3 months old...the unit was replaced a couple of months back

'Shifter

iTrader: (2)

Throttle Position Sensor.

91ChevyRS

Thats what I thought it was as I asked the question. Ok so I looked on the guide of codes and it said that TPS voltage is low...


What does that mean and how can I recharge that, do I have to go out and buy a whole new sensor or what.

And as far as code 32...what gives, I replaced the EGR recently, it shouldnt be doing this...

camaronewbie

Reading the codes: When key on, the SES will flash once, then twice. Then it will repeat. Then it will repeat again, for a total of three times (flashes once, then twice, then once, then twice, then once then twice). This is initial code letting you know that it's going to flash codes. Then it does the code, in the same manner. So for a code 32, after the 1/2 sequence it will flash 3 times, then 2 times, then 3 times, then 2 times, then 3 times, then 2 times. Then more codes will follow, always in a sequence of 3. If that's the only code, it will flash the 1/2 sequence again.

So, for a code 32, when key on it will flash 1,2 - 1,2 - 1,2 - 3,2 - 3,2 - 3,2 - 1,2 - 1,2 - 1,2.

For a code 32 AND a code 54, it will flash 1,2 - 1,2 - 1,2 - 3,2 - 3,2 - 3,2 - 5,4 - 5,4 - 5,4 - 1,2 - 1,2 - 1,2.

Make sense? Try the codes again and make sure you're reading them correctly.

TPS is the Throttle Position Sensor - it's located on pass side TBI Unit, has a connector going to it - make sure connector is seated good if that's the code you get.

EGR - did you get the right EGR valve? There are 2, a negative and a positive. Also check vauum lines going into and out of EGR - make sure no cracks, leaks. Might also be the EGR solenoid - the electric component.

91ChevyRS

yeah I messed up the first couple of times, but I got it all right now....kept a close eye on it this time.

So it is my code 22 and code 32...

I dont agree with code 32, it shouldnt be flashing. There could be on explanation though. I tore a hose (near the EGR valve itself) I didn't know what it was at first but nonetheless I took no chances and went and replaced the hose. However the hose I got from the store isnt of the same material as the other hose. this one is more a less a vacuum hose and isnt made for engine temperature either...but I figured it should work for the time being.

The hose I tore didnt connect to the EGR valve itself, it was connecting to something next to it...as far the TPS, I have no idea where it is, should I take off the air cleaner assembly to get a better look at it?

I'll take another look and find out

91ChevyRS

ok so it is a code 22 and a code 32...

the code 22 is the TPS (Throttle Position Sensor) and code 32 is the EGR.


Here's the deal with the EGR. About 3 months ago, my car was running really really badly. The exhaust smell was terrible and unbearable, not to mention I averaged in prolly 12mpg at best...I went to the shop to have them diagnose my car (I didn't know the paper clip trick then) and I told them what was happening to it, and please tell me what needs to be done.

After getting a free computer scan from them, the car flashed a code 32 which was...the EGR system. He said that I needed a new EGR valve and EGR solenoid. I got those two parts from a seperate store (he didn't have them in stock) so I had them put it in. I got the car back 3 days later, and I felt an immediate difference, suddenly the car felt more responsive. From then on I just started getting good gas mileage, and I was up to averaging about 18mpg (depending on how I drive it) there was an incredibly loud ticking noise when I had the EGR problem too, and it went away when it was replaced.

I don't suspect the EGR to be faulty, it shouldn't be at all. My gas mileage has been good since then, and the car hasn't shown any ticking signs or anything like that. Now could this hose I tore be the prominent suspect? And if I fix the problem, shouldn't the SES light turn off by itself or do I have to reset the computer (which I don't know how)

as far as the TPS goes, where is it exactly and is it hard to replace. Generally I am good with sensors, but I have had a few bad experiences with them. There was something that I did snap off on accident as well...(I messed up too much trying to change a simple distributor cap and rotor ) it wasn't really something to get hiked up about though. It was just a piece of plastic.....


Its kinda hard to explain and if I try anymore I'll confuse the lot of you. Anyway, any ideas folks?

btw, you guys helped me out quite a bit. I appreciate M. Hall's help too

nameinuse

91ChevyRS

the EGR solenoid is the electronic looking thing right. I don't think the hose I touched had anything to do with that. I might have to look at it again, but I am almost positive.

Does anyone have a picture of the TPS just so I know what to look for?

camaronewbie

Sounds to me like, if the car runs decently now, just clear the codes and drive for a few days and see what happens. The EGR is probably old, and the TPS may be as well. Clear them by disconnecting battery for a few minutes.

91ChevyRS

yeah ok, so I checked out the stuff today, and the hose that connects directly to the EGR solenoid was cracked and bad, so I took off the cheapie plastic hose and replaced both hoses with rubber ones and the car seems to be doing fine I guess. I hope I connected them in the right spot again...other wise I didn't do it right.


But I am sure I did...I replaced the TPS (easy)

Car is driving fantastic

'Shifter

iTrader: (2)

91ChevyRS

thanks for the help Hall. I owe you one...