engine bOGS fULL THROTTLE
Thread Starter
Intermediate
Joined: May 2012
Posts: 35
Likes: 1
engine bOGS fULL THROTTLE
1986 HEY gUYS, YOU ARE SO MUCH HELP TO ME. If I gradually push the pedal, car runs smooth, When I nail it, total bog down ? Please help. Injectors new, plugs good, New cap, rotor, T.P.S, MAF new, IAC new, Full regulator & fuel pump new,
Last edited by lanecarpentry; Jun 12, 2012 at 07:40 PM.
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
Burning Brakes
Joined: May 2011
Posts: 838
Likes: 2
From: Louisville Ky
new stuff does not mean its all working properly. sounds like a fuel delivery issue.
does it miss, sputter, or simply no response? if the throttle is gradually opened to full, same problem? I know the air filter is not blocked, right?
"the book" says tps, maf sensors; fuel pressure; spark plugs and wires, ignition timing. terminal D, ckt 453, of the dist 4 way plug, poor connection or open. on the 91, this is the red/blk wire.
my thoughts are that timing would have to be retarded by 6-8 degress to cause it, not likely, since you have no other issues, but- you need to know.
I would check TPS voltage, from idle to WOT, if it was not checked and set when installed, or even if it was.
incorrect polarity between ign coil and pick up coil can cause "poor performance," so the fsm says.
I would try running with the EST, tan wire from 4 way connector, unplugged. Looking for clues, that's all. there might be an obvious root cause to someone, not to me.
saludos, joe
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
not much help on this, is there?
new stuff does not mean its all working properly. sounds like a fuel delivery issue.
does it miss, sputter, or simply no response? if the throttle is gradually opened to full, same problem? I know the air filter is not blocked, right?
"the book" says tps, maf sensors; fuel pressure; spark plugs and wires, ignition timing. terminal D, ckt 453, of the dist 4 way plug, poor connection or open. on the 91, this is the red/blk wire.
my thoughts are that timing would have to be retarded by 6-8 degress to cause it, not likely, since you have no other issues, but- you need to know.
I would check TPS voltage, from idle to WOT, if it was not checked and set when installed, or even if it was.
incorrect polarity between ign coil and pick up coil can cause "poor performance," so the fsm says.
I would try running with the EST, tan wire from 4 way connector, unplugged. Looking for clues, that's all. there might be an obvious root cause to someone, not to me.
saludos, joe
new stuff does not mean its all working properly. sounds like a fuel delivery issue.
does it miss, sputter, or simply no response? if the throttle is gradually opened to full, same problem? I know the air filter is not blocked, right?
"the book" says tps, maf sensors; fuel pressure; spark plugs and wires, ignition timing. terminal D, ckt 453, of the dist 4 way plug, poor connection or open. on the 91, this is the red/blk wire.
my thoughts are that timing would have to be retarded by 6-8 degress to cause it, not likely, since you have no other issues, but- you need to know.
I would check TPS voltage, from idle to WOT, if it was not checked and set when installed, or even if it was.
incorrect polarity between ign coil and pick up coil can cause "poor performance," so the fsm says.
I would try running with the EST, tan wire from 4 way connector, unplugged. Looking for clues, that's all. there might be an obvious root cause to someone, not to me.
saludos, joe
Burning Brakes
Joined: Aug 2003
Posts: 944
Likes: 0
From: Mesa Az
is the car all stock?
have you changed the Throttle Body, or the tuning? anything else you can tell us about this... does it do it at all temperatures?
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Thread Starter
Intermediate
Joined: May 2012
Posts: 35
Likes: 1
Thread Starter
Intermediate
Joined: May 2012
Posts: 35
Likes: 1
It takes about 7 cranks to start, In the am when it sits overnite, when it starts up it idles normal, It will start fine all day, It breaks up when nailed full throttle, if you gradually give it gas, it is fine
Instructor
Joined: Feb 2012
Posts: 187
Likes: 1
From: Rockford Michigan
Good Luck!
G