kenDRIC-

my car when i start it up it revs to 2 rpm and it drops below 1 rpm it doesnt idle well i was wondering what would that problem be fuel injector ? spark plugs? tranny mounts ?

OLD_HATCH

man you posted about the same problem in 4 different places. It's better if you make one thread and wait.


your descriptions are prettty vauge though.

you say your idle goes from 1 to 2 thousand rpm. Does it do this all the time, or only when cold?

the car should idle well below 1000 rpm. It should actually be at about 700 rpm after warmed up.

how long have you had this car?

how has this car been maintained?

eny check engine lights?

kenDRIC-

i just recently bought this car it was in bad condition when i start the car it idles and the it drops below zero stays at 1rmp plus when im in low rpm the car shakes the whole car the light are on abs tbs srs like i got the car 2500 1999 rl 220km but another thing did u know what this marking means on the engine? is this a replaced engine my friends have told me yes but im not too sure

kenDRIC-

http://sphotos.ak.fbcdn.net/hphotos-...143011_1933746

OLD_HATCH

the engine is supposed to have a plastic cover on it. The yellow numbers are from a junkyard. Ur engine, or intake mani has been replaced.


how can the rpm drop below zero? I don't think ur explaining that right.

I'm sorry to tell you, but an RL like you describe is nothing but trouble. Be prepared to pay a mechanic thousands to get it running right. If you just bought it take it back n get ur money back

old luxury cars are expensive to maintain, especially when they're as neglected as yours

kenDRIC-

http://www.youtube.com/watch?v=RyoBD-9fSIw i upload the video honestly im down to drop some stacks into the car to make it nice ull see the rpm drop is that normal

kenDRIC-

the check engine light is not on but the abs srs tcs are the shaking the forums been telling me engine mount would u know where the engines vin would be so i can check if its the same as the chasis vin

Japam

Does the engine shake a lot while driving, too? Does it shake a LOT when you come to a stop/slow down? Is there a loss of power in the higher gears? Like let's say you're on the freeway and you want to pass the car in front you and you mash on the gas, does it barely pick up if at all? My 240sx did that because one of the valve seals broke so it was only running on 3 cylinders. The engine shook like hell at lower rpms.

kenDRIC-

no not at all when im driving it it so smooth it pick up nice but at when i get to a stop sign the car shakes when i put it in neutral its shakes not as hard but when i drive its good only at stop lights it shakes when i take off it stops shaking

Japam

I dont know what to say man...don't know much about the car yet as I only owned mine for a couple of weeks now.

kenDRIC-

does ur car do the same when u start it up in the video??

speedyd718

just throwing out ideas, but could it be the iacv (idle air control valve) or fast idle air valve. i'm not really sure how they fail on these cars.

or maybe some loose, missing, or cracked vacuum lines? since it definitely looks like repair work was attempted.

i agree with old_hatch, the yellow writing on the intake manifold generally means used replacement parts.

is there any way for you to find out if it was just the manifold replaced or the whole motor?

OLD_HATCH

in that video, was the car at normal operating temperature? Idle shouldn't drop like that or be at 1000 rpm when the engine is at normal operating temperature.


if your serious on keeping this car, I say start simple. Give it a good tune up and then follow with some trouble shooting.

if this engine was run on anything but premium it probably has alot of deposits. Run premium gas

change plugs, fuel filter, air filter, pcv valve. Get some gumout Regane hig milage at walmart and run them through a couple of tanks along with maybe some seafoam. If your good mechanicly that it. It sucks when you have to pay others to do all this work.

DUECEON9ER

Rpm rising and dropping when at normal operating temp is most likely a vacuum leak. Rpm rising and dropping during cold start could be fast idle valve but I don't think the 1999 is equipped with one. Also check the the mass air flow sensor on the air intake I think yours is equipped with one or if not the idle air control valve. Change the spark plugs to ngk platinums do not gap them you will ruin the platinum on them they are pre-gapped. You might even have a partially plugged fuel filter or fuel pump filter but not most likely.

Jimmay

I know my RL came with a fast idle control valve. You can clean them with some Deep Creap or carb and choke cleaner. Mine was sticking and i had a funny idle. Like Old Hatch said...do a basic tune up and then troubleshoot.

kenDRIC-

well i just replaced the sparks and it has better response its funny my car when cold it doesnt shake but when the car temperature is warm it starts to shake ill look into it if its the vacuum or idle control but it shakes thanks for the input

DUECEON9ER

Probably a vacuum leak. Look for broken vacuum hoses around the back end of the air box, behind the intake manifold, the gasket on the intake manifold, and also check the check valve on the brake booster hose. Don't forget any vacuum hose going to the throttle body and last but most common if you take off the whole air intake assembly you'll probably see that the boot going onto the throttle body is torn that is most likely your problem.