sethtroy

my question is if the motor was blown would the vacum on the boost gauge still read 16-18 at an 800 rpm? the reason i am asking is that just recently the car has had a rough start and recently flooded i changed the plugs and oil about a week ago after it flooded and the plugs got fouled within a weeks time. i think it may be an injector just leaking because the car runs great just the startup is rough. no white smoke after it warms up for about 1 minute. i am going to pay for a compression test on tuesday, but wonder if it is worth it. also the gas is only on the top 2 injectors not the bottom 2 if your going from underneath the car. which injectors are those the 850's i am thinking correct me if i am wrong.

thanks for any info or advice it will be greatly appreciated

mmonaco

typically when its blow apex, side seals, corner seals, your vaccum readings will bounce around as it idles. Dont pay for a compessoin test do it yourself it a easy task. Just make sure you are checking all surfaces of each rotor

Marc

sethtroy

i will do a search for it on how to check for compression. so then does it sound like an injector is leaking? also i have all 9's for spark plugs should i go back to 7's and 9's? my mods are pfc, downpipe, midpipe, cat-back, and all saftey mods.thanks again for the replies

DaleClark

iTrader: (55)

If you wanna know if you have a blown motor, do a compression test. A vacuum gauge won't give you the answer you need.

Vacuum of a blown motor, and a healthy motor for that matter, varies greatly. There's various degrees of blown and good for that matter.

Have you also checked the easy stuff, like the vacuum line to the MAP sensor?

Dale

sethtroy

thanks for the help i will check the map sensor. any other suggestions about going back to the stock plugs from the all 9's? could that cause a rough start? thanks again for any help

ijneb

Dont worry about having all 9's.
The 7's were only there for emmissions reasons (if I remember correctly).
Do 9's all the way around.

Just take it to a rotary specialest and pay them to do a compression test and get it over with.
-Ben

sethtroy

thank you i have a appointment on tuesday fro a compression test. is there a way to check for a leaky injector? only the 2 top spark plugs are the ones always wet not the bottom 2 (looking from underneath the car). also which injectors are those and how easy to get to them? thanks again for everyones help

GoodfellaFD3S

iTrader: (213)

In your first post you mention top/bottom injectors, now you are talking about top/bottom spark plugs. The primary fuel injectors are 550cc's and sit right on top of the intermediate housing (so on the bottom, relatively speaking) and the secondaries are 850cc's, they fit into the lower intake manifold.

With that kind of vacuum at idle, your motor is not blown. A compression test isn't really necessary, in my opinion.

sethtroy

my vacum is 16-18 at 800 rpm. the idle also dosent bounce at all stays right there. i pulled the oval looking box infront of the intake manifold to see some of the hoses one looks like it is missing i will post a pic of it. also the top 2 spark plugs sorry about the mess up in the 1st post those are the ones that are always wet. which injectors are those and how do i get to them and is it easy thanks again for the help

sethtroy

here is the pic of the hose

importrx7

If he had a blown seal wouldn't it idle like ****, and have troubles starting.

sethtroy

can anyone help with the gas in the top 2 spark plug holes? is this a sign of a leaky injector or somthing else? if it is a injector leaking which ones are they and where are they located for removal? thank you again for all your help everyone

TT_Rex_7

Usually if your spark plugs are soaked with fuel your flooded. Atleast thats what the prob. was with mine. It will create a rough idle until its unflooded. I'd unflood your car and try again. Even if you've replaced the spark plugs and so on it can take several attempts to unflood your car. If you still have probs go ahead and get a compression test. Either way it won't hurt to get your motor a compression test.

-Alex

tiger18

iTrader: (1)

When you say gas in the top 2 injector holes i presume you mean you got petrol covered spark plugs. if both the top 2 spark plugs are fouled then you would have to have an injector leaking in both rotor housings which i cant see happening. (u mistaken with the engine mate you need to study some pictures) each rotor and house has 2 injectors a primary and a secondary,,, they are located under the large inlet manifold that runs accross the top of the engine. i dont think leaky injector is your problem

sethtroy

when i pull the plugs to unflood the car the bottom 2 spark plugs are fine and the top 2 spark plugs are wet with gas and they are fouled. what could this be?

TT_Rex_7

That has happened to me also, just do the unflood procedure a few times and clean off the spark plugs and try again. I'm not sure how your doing this but this is how I do it:
-Mark all the spark plug wires to where they go
-remove all spark plugs
-removed fuel pump fuse
-made sure the spark plug wires are no where NEAR the plug holes (the fumes could ignite)
-crank the car for 15 seconds and then wait 30 mins to do it again (repeat 3 times or until no fumes or strong odors come from the plug holes
-clean spark plugs
-put everything back and crank the car over

You can also just remove the fuel pump fuse and crank it over until the car dies then follow those steps. That should limit the possibility to the spark plugs igniting the fumes but still make sure they are no where near the plug holes.

-Alex

sethtroy

what about a leaky injector could that be a possability? i have unflodded it 2 times in the last 2 weeks.

sethtroy

bump

TT_Rex_7

Did you try the way I posted? I really really don't think its an injector problem.

-Alex

sethtroy

i am going to let it sit for a day to dry out then try it again. i am going to replace the spark plug wires. heard anything good about msd spark plug wires or magnecor? thanks again

TT_Rex_7

Letting it sit will not "dry it out" With a piston motor that seems to usually work but from what I've seen/read/experianced letting it sit will not unflood it. If you do what I said up there and do it until you dont see any more exhaust fumes coming out or a strong odor of gas you'll probably be set to go. As far as wires go, I have the magnacor 10mm wires and work great, if you think thats going to solve your problem though, its not.

-Alex

sethtroy

what else could it be? it just flooded one day after it sat for like 2 days. then it started getting a rough start. i unflooded it put new plugs in it and it still does it. i have to hold the clutch and gas down to get it to start up. it wont start with just the clutch in. with the clutch in and the gas floored it starts but shoots out a lot of smoke like gas smell and the rpms are slugish for alittle bit. after it warms up the car is perfect vacum is good idle is good right around 800. boost is good 8-10-8 drives fine, but once i turn it off and let it sit for about 30 minutes or somtimes longer or shorter it dosent want to start unless i hold the clutch and gas at the same time. thanks for all your help i really apprecite it

TT_Rex_7

I think you mean boost is 10-8-10, I'd first unflood it like I told you and try again. If that doesnt work then we'll def. know thats not the problem. Off the top of my head I can't think of what else it could be but im sure others will chime in soon. Is there something you did to the car right before this started happening or did it start happening out of the clear blue sky?

-Alex

sethtroy

girlfriend drove it home from work it sat for 2 days in the cold like below 40 degress and then it started. she said it was fine she drove it slow. she is scared of the car so i know she didnt get on it she dosent like the turbos when they boost.lol if it was flooded wouldnt it have burned out once i got it started and drove it for acouple hours? or does it take awhiile for the fuel to burn out?

TT_Rex_7

Sometimes when its cold out and I start my car it idles like **** and smokes like a damn steam engine and it all goes away once at operating temperature, especially when its sat for a few days. Although that doesnt explain why your top 2 spark plugs are wet. Are they like drenched in fuel or just a little wet?

-Alex