Description Updated, Please Read: D16y7 Head on D15b2 Block!
Reaccion
Senior Wagonist
Problem: Hello wagon lovers! As you may have already read on one of my threads, I had some problems with two bent valves on my wagon (viewtopic.php?f=7&t=11075" onclick="window.open(this.href);return false;). I ended up installing a d16y7 on my D15b2 block.
We used everything from the D15b2 original wagon setup: Harness, complete DPFI manifold intake, distributor, BRAND new head gasket, and CAM GEAR. From the D16y7 we used, head, D16Y7 timing belt with the D15b2 cam gear.
The wagon has not been working well after that. The wagon runs fine but sometimes it feels like if there someone would have unplugged a spark plug wire while driving and then plugged back when I take my foot off the gas pedal. The problem feels like when there is a bad spark plug or like if there was not enough fuel being pumped… I do not know.
We tried by changing the spark plugs and wires, PCV valve, and nothings helps. We also had to advance the distributor to the maximum to minimize the problem. It still happens though.
Do you think that the problem has anything to do with the distributor? Please note that we are still using the D15b2 distributor... PLEASE HELP!!!!!!!!!!!!!!!
Solution: Wow, I found out what the problem was. The problem was a bad spark plug wire. I changed them with brand new ones but it seems that one of the wires was defective. Problem fixed! Thanks for your help guys!!
We used everything from the D15b2 original wagon setup: Harness, complete DPFI manifold intake, distributor, BRAND new head gasket, and CAM GEAR. From the D16y7 we used, head, D16Y7 timing belt with the D15b2 cam gear.
The wagon has not been working well after that. The wagon runs fine but sometimes it feels like if there someone would have unplugged a spark plug wire while driving and then plugged back when I take my foot off the gas pedal. The problem feels like when there is a bad spark plug or like if there was not enough fuel being pumped… I do not know.
We tried by changing the spark plugs and wires, PCV valve, and nothings helps. We also had to advance the distributor to the maximum to minimize the problem. It still happens though.
Do you think that the problem has anything to do with the distributor? Please note that we are still using the D15b2 distributor... PLEASE HELP!!!!!!!!!!!!!!!
Solution: Wow, I found out what the problem was. The problem was a bad spark plug wire. I changed them with brand new ones but it seems that one of the wires was defective. Problem fixed! Thanks for your help guys!!
Comments
How did you get an upper timing cover back on? The b2 lower cover will not match up with the upper cover for the y7 or vice versa.
The throttle cable just hangs there because it used to have a holder on the old valve cover. The y7 valve cover is higher, due to the different placement of the plugs, and has no holder for the throttle cable due to the fact that it came off of a MPFI engine. Bend the bracket that locates the throttle cable up some or you will get binding in the throttle cable.
Please replace the PCV valve. Its not necessary to replace it with a new one, just clean it thoroughly. It does not add horsepower it doesn't do anything advantageous to take it off.
As far as the problem goes. Try some of the things mentioned below related to timing. Generally speaking the distributor should be right in the middle of its adjustment. If the cam timing is off generally the car will feel sluggish down low and then pick up quickly as the revs rise. I doubt it is either of these things since you said that it was running fine on the drive home. Check the connections the fuel injectors/throttle body/electronic carburetor thing. I would then check to make sure all of the plug wires are actually making contact with the plugs. The y7 motor used a different boot than the b2 if I remember correctly. Again the valve cover is taller therefore the boot is longer.
I would try all of these and if the problem still doesn't subside I would give the MAP sensor a looking at. Doubtful thats the problem but it never hurts. These things require a certain amount of seemingly arbitrary messing with before they run again. I.e. if you put a different head on a block that it wasn't intended for you are doomed to an hour of messing with. A DOHC in a wagon one whole days worth of messing with.
Sorry for the lengthy post but I hope this helps.
Since the D15 timing belt did not fit the Y7 head, the mechanic tried by switching the cam gears. He put the D15 cam gear on the Y7 head.... After that he supposedly set it up in time...
A-) Yes, actually the D15 timing belt did not fit correctly so he was forced to use the Y7 one.
B-) Well, I put the timing belt cover myself. I just cut it to make it fit.
C-) Yes, I actually did bend the throttle body cable holder already.
D-) I just replaced the PCV with a new one. I could have had cleaned the old PCV valve but I rather bought it brand new to play safe. It is worth the $5.00 at AutoZone.
E-) I would have someone else check the timing for me again. Yes, the car was running fine in my way back home. I will again revise the connections, the fuel injectors, throttle body, and the electronic carburetor things. I will also check if all of the plug wires are actually making contact within each other.
F-) I will definitely have the MAP sensor as well. I also doubt it but like you said, it never hurts to check it.
G-) Thank you very much for taking the time on writing such of nice ideas and suggestions.
Yes, actually the mechanic switched cam gears. He put the D15 cam gear on the Y7 head.... After that he supposedly set it up in time. I am not sure about the btdc though...
I am using the D15 wires... However, I adjusted them to fit all the way to the spark plugs....
Yes, we actually used the d15 cam and Y7 timing belt. The dizzy also had to be advanced all the way as well....
Yes, I already changed the spark plugs and PCV valve... I will change the spark plug wires too...
Yes, we put the D15 cam gear on the Y7 head...
They've done almost everything there.
The car runs just fine except when it loses power.... when I am driving the wagon and it starts losing power, I take my foot off the gas pedal and then I put the foot back on the pedal and the wagon would run fine until it loses power again and so on...
okay, I will check there too... Thanks...
1. use the b2 cam gear on the y7 head
2. use the y7 timing belt
This is still going to advance the timing 7.5 degrees IIRC.
It sounds to me that you should move the timing gear back one tooth. IE retard it one tooth. I think your cam timing is slightly off.
Yes, we use the b2 cam gear on the y7 head and the y7 timing belt. I am going to have the timing checked. However, it is very strange that the car runs very fine except when I push the gas pedal hard and quickly...
Does this have a TPS sensor??? I will check it!
Yes, I did check the distributor. I opened and check the connections, even the plug as well.