3rd Gen / L98 Engine Tech 1982 - 1992 Engine Related

Now whats wrong?

Thread Tools
 
Search this Thread
 
Old Apr 20, 2004 | 06:37 PM
  #1  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Now whats wrong?

Alright started out by me replacing a rocker arm. I took the intake manifold and all the vacuum lines off along with the valve covers. My car finally starts but it idles crazy and when I go it back fires and drives like sh*t. Smells like gas also.

I replaced the rocker arm and noticed some of the pushrods were a bit loose so I tighened them till I couldnt turn them with my finger. Then added a half a turn. Continually took the valve cover off to make sure they were all good. Had trouble with the distributor but I think I got it back to where that should be. Set it on the '0' on the downstroke (or maybe it was upstroke) side. Well i tried it both ways and it only works one. Put the rotor towards the first cylinder pointing to the first with the distributor all the way in. Hooked up all the vacuum lines the way I think they went.

I cant even get the timing to stop from jumping around so much. Goes to 6 then 0 then 8 on the other side then even past the markings. Runs horrible. I also read that you are supposed to disconnect the computer while doing the timing. Well I tried disconnecting both connectors on the back of the distributor. Car wont start. Tried just the one, then just the other.....Still nothing. I dont know whats wrong... I might not even be making sense. Im just so tired. Any ideas?
Old Apr 20, 2004 | 06:47 PM
  #2  
IROC-T's Avatar
Registered User
 
Joined: Jun 2003
Posts: 866
From: So.Cal on the Best coast
Just above the heater in that big bunch of wires there is a brown and white wire with a connetion. Unplug that to time the engine , then plug it back and restart to reset SES light.
Old Apr 20, 2004 | 07:26 PM
  #3  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Originally posted by IROC-T
Just above the heater in that big bunch of wires there is a brown and white wire with a connetion. Unplug that to time the engine , then plug it back and restart to reset SES light.
So there actually isnt any other way to do the timing unless you pull that plug? Because I heard the computer keeps trying to adjust itself while your trying to adjust it manually. Ill try it out tomorrow. Hopefully this will be the end of my problems.
Old Apr 21, 2004 | 09:11 AM
  #4  
Smooothie119's Avatar
Registered User
 
Joined: Mar 2000
Posts: 119
From: Altamonte Springs, FL
Correct, that brown & white wire runs to the computer. Any changes made to the timing while that wire is plugged in will be a waste because the computer will sense the adjustment & correct it.

If you set the timing while the computer is 'unplugged', it won't compensate for any changes because they weren't made while it was monitoring the engine. Then when you plug the wire back in, the computer resets itself & uses the current base timing as it's new point of reference.

Hopefully someone will correct me if I'm not completely right here, but I think I got the jist of it.
Old Apr 21, 2004 | 09:36 AM
  #5  
aklim's Avatar
Banned
 
Joined: Mar 2001
Posts: 3,249
You cannot simply tighten the rockers like that. You have to set it to TDC #1. At this point, the timing mark and the balancer will meet and then you do the intakes of 1, 2, 5, 7 and exhaust of 1, 3, 4, 8. Rotate the crank again till the mark on the balancer lines up with the timing mark again. Do the remaining valves.

I loosen the nuts completely and then tighten them while spinning the pushrods. Once I feel drag, I would tighten them about 1 turn and stop.

I believe the ECM uses 6 deg as base whether you have it set at 6 or not. IOW, it assumes you have it set at 6 and startes advancing or retarding from that figure. Unhook the tan wire at the strut tower area and that is your base timing without the ECM altering it.
Old Apr 21, 2004 | 02:29 PM
  #6  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Originally posted by aklim
You cannot simply tighten the rockers like that. You have to set it to TDC #1. At this point, the timing mark and the balancer will meet and then you do the intakes of 1, 2, 5, 7 and exhaust of 1, 3, 4, 8. Rotate the crank again till the mark on the balancer lines up with the timing mark again. Do the remaining valves.

I loosen the nuts completely and then tighten them while spinning the pushrods. Once I feel drag, I would tighten them about 1 turn and stop.

I believe the ECM uses 6 deg as base whether you have it set at 6 or not. IOW, it assumes you have it set at 6 and startes advancing or retarding from that figure. Unhook the tan wire at the strut tower area and that is your base timing without the ECM altering it.
This is a man that knows what he's talking about. Thanks. Alright if I had top dead center before all I would have to do is manually turn the crank until the rotor is facing the 1st cylinder again. Right? At TDC should I have the timing mark at 0 or 6 before? or in that case 6 after? Haha. so many settings. Just trying to get her running again. Thanks guys
Old Apr 21, 2004 | 08:54 PM
  #7  
aklim's Avatar
Banned
 
Joined: Mar 2001
Posts: 3,249
Originally posted by WhiteKid
This is a man that knows what he's talking about. Thanks. Alright if I had top dead center before all I would have to do is manually turn the crank until the rotor is facing the 1st cylinder again. Right? At TDC should I have the timing mark at 0 or 6 before? or in that case 6 after? Haha. so many settings. Just trying to get her running again. Thanks guys
This is a man who has tightened the pushrod when it was not supposed to be done. This is a man who has also had to R&R the intake manifold to get at the broken pushrod.

As you turn the crank and the balancer mark lines up with the timing marker the rotor on the dist will point at either #1 cylinder or #6 cylinder which is opposite. When it points at #1 and the timing marker lines up with the balancer mark you are there. Adjust the valves and proceed to turn the crank 1 more rotation. At this point, your rotor will point at #6. You cannot see 6 deg of difference anyway so just use the timing marks. Forget your 6 degrees of base timing.
Old Apr 22, 2004 | 10:46 AM
  #8  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Sounds good. Thanks. Guess Ill be doing this today.
Old Apr 22, 2004 | 11:53 AM
  #9  
Botch's Avatar
Registered User
 
Joined: Dec 2003
Posts: 127
From: Wichita Kansas
Very helpful and respectful thread. Too many times people are hurtfull over mistakes people make. Live and Learn I say.

Botch
Old Apr 22, 2004 | 01:43 PM
  #10  
aklim's Avatar
Banned
 
Joined: Mar 2001
Posts: 3,249
Originally posted by robvas
Roll your pushrods on a sheet of glass to see if they are warped
Actually, now that you mention it, I wonder if he tightened the pushrods to the point that they warped only or if the lifter could be f**ked too. If the pushrod is warped, I would suspect the lifter was probably subjected to huge amounts of stress and might not be trusted anymore. That said, perhaps a set of lifters and pushrods might be in order.
Old Apr 22, 2004 | 06:22 PM
  #11  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
They all looked good. I will be changing everything early this summer. Car still runs like crap. I dont know why. Im gonna go outside and change the wires quick. The tack even goes haywire just bounces around everywhere.
Old Apr 22, 2004 | 07:06 PM
  #12  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Originally posted by WhiteKid
They all looked good. I will be changing everything early this summer. Car still runs like crap. I dont know why. Im gonna go outside and change the wires quick. The tack even goes haywire just bounces around everywhere.
Does anyone think that the cats could be clogged? It sounds like it idles ok when it first starts up. The warmer the car gets the crappier it runs. Tack bounces everywhere, stalls, no power at all. I changed the wires hoping thats what it was but it wasnt. One wire was bad tho. Any more suggestions? Thanks
Old Apr 22, 2004 | 07:42 PM
  #13  
Rice Killer87's Avatar
Registered User
 
Joined: Feb 2003
Posts: 1,601
From: Virginia
yea,the cat could be clogged,but it wouldnt just all of a sudden happen like this i dont think.

u SURE the timing is right? how about the firing order,u have the plug wires in the right spot on the distributor?

firing order is 1-8-4-3-6-5-7-2
Old Apr 22, 2004 | 10:01 PM
  #14  
IROC-T's Avatar
Registered User
 
Joined: Jun 2003
Posts: 866
From: So.Cal on the Best coast
Originally posted by WhiteKid
Does anyone think that the cats could be clogged? It sounds like it idles ok when it first starts up. The warmer the car gets the crappier it runs. Tack bounces everywhere, stalls, no power at all. I changed the wires hoping thats what it was but it wasnt. One wire was bad tho. Any more suggestions? Thanks
If you suspect the cat a good way to check it is to have someone rev the engine while you watch the cat,if it puffs up alot it is more than likely shot. Anotger thing to check is the distributor shaft for free play (wobble)shouldn't be much if any.
Old Apr 23, 2004 | 09:59 AM
  #15  
WhiteKid's Avatar
Thread Starter
Registered User
 
Joined: Mar 2004
Posts: 201
From: Pocono and Millersville, PA
Originally posted by Rice Killer87
yea,the cat could be clogged,but it wouldnt just all of a sudden happen like this i dont think.

u SURE the timing is right? how about the firing order,u have the plug wires in the right spot on the distributor?

firing order is 1-8-4-3-6-5-7-2
Yea i checked the firing order so many times. Someone said it might be the TPS so Im gonna check that today with an ohm meter. Also gonna check the fuel fuses. Dont think this is it but its worth a shot. Maybe change the fuel pump relay also.



All times are GMT -5. The time now is 03:09 PM.