I have defi blue racer gauges, and my oil pressure is constant most of the time and it changes nicely, but sometimes it jumps around as if it was tweaking out, and I read somewhere else that it's just all the vibration from the car that causes the sensor to misread sometimes...

 

my defi on jumps around if i hit the gas hard or let off fast. i belive mine is doin that because i installed the sending unit with the 42draft designs adapter..so the oil has to kinda make a bend to get to the sender

 

do ya'll think part of why it jumps around a lot is because I'm using 10w-40 oil instead of 10w-30???

I'm using the heavier oil to break in my newly built engine just as AMS recommends

 

also I'm using regular engine oil. Not a synthetic or synthetic blend just as AMS recommends. Do you think this could have anything to do with it?

 

hate to keep posting replies but I'm trying to figure this thing out before my tune date on this coming Tuesday. November the 6th ath Buschur

I did a whole rebuild but its not really leaking from anywhere on the engine which makes me think it might be the oil pickup line inside the oil pan. If you've ever been in there you see that there is a line with a filter on it then it has a gasket that attaches that line to the rest of the pickup system. I was thinking maybe that gasket could be bad or something and causing air to be picked up in there also which might cause the fluctuation in oil pressure that I'm talking about. Do you all think this is possible???

 

After your rebuild, and after you put the oil lines with the banjo bolts attached to the block, from the turbo, did you index the oil fittings? If not that can cause the fluctuation.

 

+1 you could have a clog or something restricting flow somewhere in your system.

 

is it mechanical or electrical...might be the ground or your power source if it is electrical

 

All lines are hooked up correctly to my knowledge. Index the oil fittings? do you mean just match them up correctly???

I don't seem to get any leaks. if it were the oil cooler lines I'd think it would leak probably but I could be wrong. It's mechanical I'm pretty sure because all of the defi gauges are linked together and none of the others is getting any funky readings.

also in order for the stroker kit to work you have to bend the oil squirters so it does not make contact with the piston. i was thinking this could be part of my problem but we barely had to bend them and i"M thinking if one of those were bad I'd already know about it because my engine would probably blow . pluse that would probably be more of a constant loss of pressure I'd think but I dont know for sure

I'm thinking its that gasket on the oil pickup though. have any of ya'll had problems with this???

 

What I mean is, that inside the banjo bolt is a passage way. It can either be inline with the feed, or return, from, or into, the oil line, or not. When it is indexed properly, they will line up, and the oil will not have to travel around the channel that is inside the ends of the oil lines, but will travel straight into the banjo bolts hole. This allows a direct pathway for the oil instead of a not so straight through path. Sometimes, they do not line up. Which is why the channel in the oil lines is there. Regardless of the channels it causes a fluctuation.

 

OH okay no I havent checked that for sure yet. Thats a REALLY good idea though and I never thought about that. I'll be sure and check that when I get up to ohio. My cars up there a shepherd transmission right now and I'll be going straight to Buschur's to get it tuned if I can get this corrected. Yeah I'll definetly check that

THanks for that idea

 

Does it fluctuate at idle too?

How about under a load in the upper rpms?

You also might try taking different readings from various places on the engine to see if the fluctuation can be found elsewhere besides just at the oil filter housing.

 

At Idle it doesnt fluctuate a lot that i've noticed. at the higher rpms it doesnt fluctuate at all either. It's more of the middle rpm's . like 2500 or 3000

 

Ok thanks for ya'lls help. I'm going up to ohio today to try and fix this little oil pressure problem before I get the car tuned. I brought basically every tool I have lol. But like ya'll said I guess things to check for are the oil pickup tube gasket (inside the oil pan), indexing the oil cooler lines. and check for electrical problems within the gauge. I guess those are the only possible ones because I do not have oil leaks so I wouldnt guess it would be the oil pump itself or the oil filter adapter.

But thanks for ya'lls help!

 

its just the gauge.... SW sucks, I recently replaced all mine with Autometer. My oil and fuel pressure gauge are all 95% smoother, and my boost is spot on with my MAP. My SW boost gauge was off 3psi, meaning it read 3psi high

I kinda figured this aswell with this adapter.


Bottom line is I wouldnt worry about it.