anubix
01-29-2008, 08:16 PM
need help!
(brief history) 88 lxi manual
-installed (succesfully) jdm a18a
*turned out to have a warped block, so they gave me a a20a1 to replace it (no warranty)
here's where I'm at:
- got the a20 in and fired it up, ran great but needed a little fine tuning.
- leak from water pump (gmb style purchased 5/07 for a18a) so i took it off and used some rtv silicone
-fired it back up, water pump appears to have stopped leaking, sounds beautiful @ idle, but when I go past 2500 rpm it misses like a mother (like my 65ranchero does when the point gap is off.....)
The only abnormality I could see, was when I hit 2500 rpm, the a/c idle boost valve would move when the engine would start missing (illustrated in attached pic) even if I disconnect the vacuum hose from it.
http://i9.photobucket.com/albums/a78/Gir42/3geez.jpg
there do not appear to be any vacuum leaks. and I have checked and re-checked all the electrical connections.
I'm getting spark and fuel to each cyl.
you can see in pic that everything is labeled thoroughly; so am positive all connections are correct.
Shot this video 4 u (in my consistently cold ass garage):
http://i9.photobucket.com/albums/a78/Gir42/th_MVI_0386.jpg (http://s9.photobucket.com/albums/a78/Gir42/?action=view¤t=MVI_0386.flv)
After I shot vid I was able to determine there was a clicking noise eminating from under the dash after the engine died coinciding with flickering of the check engine light.
I had to put a long screwdriver on it to be sure, but there appears to be a relay WAY (and I mean as far up under there as you can get, prolly have to take the cluster out to get to it) which was clicking very rapidly (felt it through screwdriver). The info on it is: MITSUBA RZ-0028 MAIN 12V (it is fuel pump main relay?). If I turn the key to on (1/2 the time) that relay will click continuously, while the check engine light flickers, and the engine will only turn over, and not start (other half of the time it will behave normally, check engine light stays on for 2 seconds when key is on, then goes off). If the engine does fire, when I give it any gas at all, it dies as in the video. The relay never made a sound before this a20a1. And I just have a feeling, that if I goto pocket-a-part and get another one, it will either do the same thing, or will go back to missing like a mofo when I get to 2500 rpm
idk wtf 2 do now.
if this were carb I would have it done a week ago.
but as of now, I keep getting blown off by the 1 person I know can figure it out
and I don't have enough money to pay to have someone else fix it.
Can someone please please point me in the right direction?
(brief history) 88 lxi manual
-installed (succesfully) jdm a18a
*turned out to have a warped block, so they gave me a a20a1 to replace it (no warranty)
here's where I'm at:
- got the a20 in and fired it up, ran great but needed a little fine tuning.
- leak from water pump (gmb style purchased 5/07 for a18a) so i took it off and used some rtv silicone
-fired it back up, water pump appears to have stopped leaking, sounds beautiful @ idle, but when I go past 2500 rpm it misses like a mother (like my 65ranchero does when the point gap is off.....)
The only abnormality I could see, was when I hit 2500 rpm, the a/c idle boost valve would move when the engine would start missing (illustrated in attached pic) even if I disconnect the vacuum hose from it.
http://i9.photobucket.com/albums/a78/Gir42/3geez.jpg
there do not appear to be any vacuum leaks. and I have checked and re-checked all the electrical connections.
I'm getting spark and fuel to each cyl.
you can see in pic that everything is labeled thoroughly; so am positive all connections are correct.
Shot this video 4 u (in my consistently cold ass garage):
http://i9.photobucket.com/albums/a78/Gir42/th_MVI_0386.jpg (http://s9.photobucket.com/albums/a78/Gir42/?action=view¤t=MVI_0386.flv)
After I shot vid I was able to determine there was a clicking noise eminating from under the dash after the engine died coinciding with flickering of the check engine light.
I had to put a long screwdriver on it to be sure, but there appears to be a relay WAY (and I mean as far up under there as you can get, prolly have to take the cluster out to get to it) which was clicking very rapidly (felt it through screwdriver). The info on it is: MITSUBA RZ-0028 MAIN 12V (it is fuel pump main relay?). If I turn the key to on (1/2 the time) that relay will click continuously, while the check engine light flickers, and the engine will only turn over, and not start (other half of the time it will behave normally, check engine light stays on for 2 seconds when key is on, then goes off). If the engine does fire, when I give it any gas at all, it dies as in the video. The relay never made a sound before this a20a1. And I just have a feeling, that if I goto pocket-a-part and get another one, it will either do the same thing, or will go back to missing like a mofo when I get to 2500 rpm
idk wtf 2 do now.
if this were carb I would have it done a week ago.
but as of now, I keep getting blown off by the 1 person I know can figure it out
and I don't have enough money to pay to have someone else fix it.
Can someone please please point me in the right direction?