I installed a cam (Crane 2032), AFPR, LT headers and 24# SVO injectors. With no PROM work the 24's obviously did not work out, the car ran terribly rich and fouled out plugs almost instantly. There was also fuel in the oil which I assume thinned the oil out so bad it was going past the rings and coming out of my valve cover breather. I put the original 22# inj. back in, changed the oil and filter about 3 times until the oil did not smell like fuel anymore and looks like clean oil when I check it on the dipstick. I just put a new set of plugs in replaced the v.c. breather with a hose running to the t.b. like it is supposed to be and took it for a ride, fuel pressure is right around 40 psi, within about 5 minutes of driving it starts running like crap (fouled plugs) and there is smoke coming from under the hood. Get back to the house and oil is all over the dipstick tube and on the engine where it has blown out, pull a plug and it is completely black, check the oil on the dipstick and it still looks good with no fuel smell to it. WTF! The car was barely driven 40 miles maybe, if that, with the 24's. Could that have been enough to ruin the rings? And what could cause it to still run so rich, even if the 02 sensor was bad could it foul the plugs that bad that quick? Engine is a 1990 5.7 TPI with about 100,000 miles, ran perfectly fine before and did not even burn any oil. I have not been able to drive the car for months due to this BS and limited time to work on it. PLEASE HELP, I need my car!

Thanks for any input

 

Anyone?.....

 

first off, i'm not to familiar with Fuel Injection, so do you have a AFPR? crane recommends it with that cam, btw i also am running the cam in mine with a carb, also double check all your hose hookups, its possible you may have an intake gasket leaking. check all that and come back. also is your SES light on? if you have a bad o2 sensor it would come on and throw a code

 

Yes, I have an AFPR. And the SES light does not come on. The oil is definetly coming from the dipstick tube, but it seems to do it only when I get on it hard. In other words when the car is just sitting running there is no oil coming out, but when I take it for a drive and floor it I get home and there is oil all over the dipstick tube and on the engine around it. I think I will crank it up and take the oil dipstick out and give it a lot of gas and see if the oil is actually spraying up out of the tube. I have not wanted to open it up to much in the driveway because I dont have my exhaust hooked up right now.(open longtubes) I guess the neighbors will just have to suffer for a few minutes.

 

Do you have a pcv valve if so is it working right? If you dont allow the gasses out the top it will definetaly find another place to go.

Is it possible that overwheliming amount of gas broke some things loose under those valve covers and clogged out PCV and or valve cover breathers?

 

PCV is working good.

 

Since my rings were not mentioned yet, I can assume that I probably did no damage there?

 

ok double check all vacuum hoses, i dont think your rings would be toast from that running rich, if it wasnt doing it before they should be fine, also you installed long tube headers? where is your o2 sensor? are you sure all spark plug wires are on the correct cylinders? did you check the TPS adjustment?

 

do a compression test and a cylinder leakdown test to make sure the rings are ok if your concerned.. better then just guessin if they're alright

 

how much vacuum do you have at the MAP sensor?...if its way low its gonna run rich as hell....

 

I'm going through the same problem right now GTA1990. I'm absolutely pulling out my hair trying to fix it. I intially thought that my valve cover gasket on the pass. side was leaking, so I put on a new gasket. That wasn't my problem. Mine only leaks under heavy acceleration as well. It's definetley oil, but has a gassy smell to it. I don't want to be the bearer of bad news, but I think we either have washed out the rings or have a one stuck. It seems as though I have a tremendous amount of pressure in the crank case. I put an aftermarket breather on my dr. side valve cover and it was saturated with oil in no time. I've since rigged up another setup that seems to be working better. If you figure anything out, post it, or better yet, email me at GroundPoundinZ@webtv.net

 

Today I put the stock valve covers back on because the chrome junk I had on there had a hole towards the back of the passenger side(for the hose that goes to the tb) and it seemed that when I drove the car the oil would be forced towards the back of the engine and it would come out around the breather,the stock ones it is in the front. Changed the oil and filter again(third time) to try to get the fuel that the 24# injectors pumped in there. Drove it up to put some gas in it, and it really did not seem to be running real great, floored it when I left the gas station and it put out a lot of black smoke. I checked for oil on the dipstick tube and on the engine when I got back and did not find any. I also turned the fuel pressure down, and it is still running rich. I do not get it, when I put the 22# inj. back in I just knew it would solve my problem of running rich.

 

So far there has been a lot of suggestions about everything. One thing came to mind after reading all of these posts, what about your ignition? I don't know about the oil problem that you have but I would check your spark and make sure that it is hot. I put 32 lbs injectors on my TPI and didn't do any chip work and it ran fine. Hope it helps

 

How do you check it, other than just making sure it is firing? The distributor and ignition module came together from Autozone, I just bought them new when I installed the cam and everything. The coil is still the stock unit. Could it be that I need a performance coil and maybe ignition module? I am sure the Autozone distributor is crap, but I was running out of money, and needed a new dist..I attempted to change the pickup coils on my stock unit and it did not quite work out. I am pretty sure I took care of the oil blowing problem by puttlng the stock valve covers back on. It does make sense what you are saying about maybe all the gas not getting burned up in the cylinders. You are running 32# inj. with no problems?!, I was hoping to run the 24#'s and just assumed that was where all the fuel in the oil was coming from. Now the stock 22#'s are fouling the plugs with barely 40psi of fuel pressure. I can not afford to take this car to a shop, nor do I trust any anyway. But I have to get this thing going, any more suggestions, keep them coming. If I were to hook a scan tool up, would it tell me if I were getting a hot enough spark? I have a laptop, I just havent got the aldl cable.
Thanks for all the help!

 

I just went out and checked the oil and it still has fuel in it. I have changed the oil and filter four times now and even ran a can of oil system cleaner through it. It is a good thing I had about 12 filters on hand that I bought when the local K-Mart was clearencing them out. What else would cause the fuel to get in the oil like this? I also pulled a plug and it was already all black just from driving a mile to the corner. The car starts right up and runs great, but just driving a mile or so causes the plugs to foul and it starts running like crap and barely stays running in gear.

 

The way that I checked my plugs was with my ac bracket. I took my ac out and there is a slot in the top of it for a stud. I just hooked up number one spark plug wire and put the spark plug in the slot so that it was grounded and had one of my friends watch the plug as I cranked the car. Try not to crank it so long that the car starts. My spark was blue/white which is good, if it is reddish then your spark is weak. Did you do the compression test, I would because the fuel is leaking in somewhere and it maybe that your rings are shot. Maybe your intake gasket is leaking somewhere and you have a fuel line leaking and its getting in where the gasket is bad? I have never heard of this happening before. Hope that bit helps

 

I'm also all for the compression test .... you are getting blow by , if it is enough to blow oil out of your dipstick tube you are in trouble. I ran my fuel pressure up over 50 psi for 3 yrs the car ran extremely rich the oil was constantly full with fuel and i never once had oil blow from any where. The 2 times I have seen oil blow from dipstick or pcv valve , it was rebuild time! CHECK THAT COMPRESSION!

 

My 02 sensor had not been changed yet, so I thought I would give that a try. New 02 sensor, new plugs, new pcv valve, and changed oil & filter again. I also unhooked the battery overnight in case it thought it still had the 24#'s in it I took it for a ride today, it seemed to run pretty good but when I got home I checked a plug and it was black. I checked the oil and could smell the gas.

Back to the oil blow by issue, I thought I had that taken care of by putting the stock valve covers back on but now the oil is coming out from around the oil cap. I have not had a compression check done yet, that is what I plan to do next. I used to always run straight 50 weight oil because it is so hot here and I drive the car pretty hard sometimes. Since doing the work I have been using 10w40, so maybe I never noticed a problem because of the thicker oil I was running. If the compression check does show bad rings, that still does not explain why it is running so rich. Does anyone else agree that it could have something to do with the ignition not burning all the gas in the combustion chamber? I am ordering an aldl cable to see if a scan will tell me anything helpful.
ANY input is greatly appreciated!

 

oil leaking by rings, fouling one or more plugs, unburned fuel in cylinder leaks down past bad rings and contaminates your oil? just my guess

 

and man , the EXACT to the T thing hapened to me ....then I blew all the seals on the motor ..... and now after 227'000 km's the 305 is dead ......... something definately let go inside .

in this order

oil up crankcase breather vent tube , oil up dipstick tube , oil comeing out of seasl in the engine ..... SNAP POP !!!!!!

time for a rebuild man

 

that sounds alot like what i went thru only i didnt have the oil blow by problem. i blew a intake gasket and parked the car for awhile before i got to fix it. when i finally replaced the gasket the dang thing ran like crap. i mean so bad that the dual cat converters got so hot that they melted my carpet under the passenger seat! runnin rich bad.......i didnt drive the car when it ran like that just at idle while i tried to find the prob. it got to where the car wouldnt even start.....it fouled the brand new plugs in just minutes! i checked for codes....none shown. this went on for months. finally me and some buddies got together. one suggested to unplug the "coolant temperature sensor" located under the throttle body. guess what....thats right! no more runnin rich. car ran like a bat outta hell. i came to find out that when the temp sensor fails it defaults to like -40*F. since this temp is not outta the realm of possibility (it is where i live) the thing neva thru a code. i spent months tryin to figure that out and a new one was only like $12.00! hopefully this helps some of your problem anyway.

 

Thanks for all of the replies. I will have a compression tester by the end of the week. I will go ahead and replace the coolant temp. sensor also. When the plugs foul out, they are dry and sooty, and they all look the same. Not like some cylinders maybe worse than others.Oh well, I will know this weekend.

 

I had the same problems. Same cam..same # injectors, AFPR and all.

I discovered that the NEW rubber grommets in the NEW valve covers were so restrictive / stiff that the pressure wasn't going through the PCV system. Instead it was squirting out wherever it could.

I took the rubber grommets and cut some of the baffling and the problem was solved. Hope this helps

 

Oh yeah...the bosch 4+ plugs were fouled beyond use...I stuck a new set of AC delcos in and I was once again at peace with the world.