md91ls

it will only start with both coil plugged in . take coil a loose it dies,plug it back in it

starts, dont sound to good . dissconect coil b it dies. reconnect, starts and runs the same. willnot start with coil a or b disconnected.runs terrible with both connected. any ideas? please reply. thanks

I unplugged each coil one at a time, will not start at all . any other ideas or advice? must not be a coil, right. it still starts fine but seems to be missing or flooding, no power. help. thanks in advance. MD91LS

if you dont talk to us, we dont know what you are doing?????????

I left home for groc., got about 200 ft. almost died on me . went back home in reverse,shut it off.restarted fine with rough running and shaking, acts like its flooding, strong smell of fuel. cil on. pulled codes #21 #28 #71. any feedback would be appreciated. were should i start ?. thanks in advance,desperate. need car for work. thanks

can I clean valve or ports, how to correct this? seems to be oil leak at bottom of timing cover or crank. cant tell were its from . HELP

does it have to be done from under the car? or can it be removed/replaced from underhood. cant get past tranny cooling lines @ bottom. any ideas ?. HELP THANKS,MDLS91

I have rear defroster and rear veiw side mirrors not working. i can hear breaker click when I turn it on and off,tried to reset braker. will not reset, possible trunk hinge wires or what could it be. thanks in advance for any info.

md91ls

http://us.lexusownersclub.com/forums/index...&pid=341236

Wasn't this your original post for this prob? You shouldn't start a new thread for the same prob. Hard to keep track of the responses and makes for unecessary repetition. Stay with one thread per prob.

thanks for the reminder,kind of got off track.

ok u call the dealer and ask for a cooling fan clutch bearing bracket then...let us know what they say and how much it is!

cooling fan clutch bearing bracket/dealer $215.00 or rockauto/four seasons $137.99 + 8.45 s&h. in stock, 4seasons #45785.

cooling fan clutch bearing bracket? no such animal

python, Oh but there is. you know, the thing between the engine and the thermal fan clutch that cools the radiator!.

need diy or info for changing clutch bracket only. without having to remove all covers again. 91ls400. thanks mejojo for reply. any more info? wicth nuts & bolts, easest way.

trying to save time. thanks in advance for any ideas, I appreciate the help you guys give. md91ls

Since all LS400's are automatics I'm confused as to which part you mean.

cooling fan clutch bearing bracket. md91ls

need diy or info for changing clutch bracket only. without having to remove all covers again. 91ls400. thanks mejojo for reply. any more info? wicth nuts & bolts, easest way.

trying to save time. thanks in advance for any ideas, I appreciate the help you guys give. md91ls

sorry, I mean the cooling fan clutch bracket. without removing all TB replacement covers. thanks. please help md91ls

hey guys. good news. not my oil pump, turns out to be my fan clutch & clutch bearing bracket/assembly. anyone know how to remove clutch bearing braket? thanks guys, you been a lot of help. I apreciate your advice. new member

md91ls

How many miles on the vehicle? If you haven't replace the timing belt, might think about doing that too, since the process is fairly close to that; just a matter of removing the crank pulley and the cover and the timing belt is right there.

N.C.O.

timingbelt has been done by mechanic. what all needs to be removed just to replace clutch bearing bracket?. thanks

md91ls.

hey guys. good news. not my oil pump, turns out to be my fan clutch & clutch bearing bracket/assembly. anyone know how to remove clutch bearing braket? thanks guys, you been a lot of help. I apreciate your advice. new member

md91ls

SRK, FWIW I thought your response was firm but appropriate. I loved the "change mechanics, not the pump"! Good advise.

Unfortunately, low oil pressure is usually a sign of sloppy main bearings. But that's on a "regular" car. Not a Lex.....hopefully.

But thats getting ahead of the issue. md, when idling, an engine's oil pressure can go as low as ~10 psi and at 2k-3k rpm be around 40-60 psi.

These are just ballpark figures.

Why did you even suspect an issue in the first place?

I would get oil light sometimes on cold days,not very often. only when starting for firt time in a.m. . would stay on for one to four min. never in warm weather. does have some valve chatter on accelaration, ususaly @ about 1200 rpm,s. the noise @ idle sounds diferrent, sort of an intermitent rough or hollow sound. I dont want to roach engine.

any more advice?. thanks guys, you are a big help. thanks again.

md91ls

LOCAL MECHANIC SAYS PROBLY PICK UP SCREEN CLOGED. CHECKED IT. ITS CLEAN. HE SAYS NOW IT NEEDS OIL PUMP,ONLY 170K MI. WELL MANTAINED. ONLY MINOR ENGINE NOISE AT IDLE. NEED INFO. WHAT SHOULD PRESSURE BE AND HOW TO IMPROVE IT. OIL ADDITIVES,ETC... I HAVE HAD NO PROBLEMS FOR LAST 3YRS. I REALLY DONT THINK ITS THE PUMP. HOW CAN I BE SURE? NEED ADVISE . THANKS GUYS. NEW MEMBER

how to change oil pump. 91 ls400. anyone know. HELP :