chrisd_1234

Drove my 1993 rx7 hard down a stretch of road. Have driven it harder before, however this time wen i was slowing down i put it into neutral and the revs dropped to 500rpm. it usually idles at 1200rpm. because of this it is struggling not to stall. It is also sluggish in the low revs. I dont have a clue what the problem could be. Its had a rebuild 10000 miles ago so isn't a proble with the rotor tips. Can any body give me any advise?

DaveW

1. check to make sure map (boost) sensor hose is still connected
2. you can blow an apex seal at any time if you get detonation - you may have to do a compression check to know for sure

chrisd_1234

ok, just started her up then, now it seems to idle like it should, however oil pressure seems to be high. still think i should check the boost hose and get a compression test?
cheers

DaveW

If it idles OK, then it may not be a blown apex seal. Disconnected boost sensor hose will cause really poor and weak running. The boost sensor is the little black rectangular box on the firewall next to the brake booster unit - it says boost sensor on top. The hose is on its bottom.

High oil pressure (up to 120 psi) when cold is normal.

Dave

JStrib

iTrader: (6)

high oil pressure...checked the dipstick?

DaveW

skir2222

What does the gauge say for oil pressure? Are you going by the one in the stock cluster, or is it a aftermarket gauge?

JStrib

iTrader: (6)

maybe just too much oil and high pressure? just a thought...

chrisd_1234

Im going by the stock cluster oil guage. just tried starting her up this morning and it didn't start, stater motor sounded fine. oil was showing no presure what so ever, checked all visual hoses but couldn't find any leaks etc.

chrisd_1234

also where is the dipstick located. I sound like a dipstick aking but i've only had it a week!!

DaveW

Dipstick is under the intake elbow on the left (drivers) side of the engine in front and to the left of the oil filter. Too much oil WILL NOT RAISE YOUR OIL PRESSURE. It can cause other problems, but high oil pressure is not one of them. as long as the oil pump intake is submerged in oil, the oil level makes VERY little difference in what oil pressure you will see.

No or low oil pressure can be a sign of a bad or dirty oil-pressure sender. They can sometimes be fixed by cleaning the contacts, or the inside of the sender, but they often have to be replaced to cure flaky oil pressure readings. The sender is below the oil filter on the side of the engine.

Dave

chrisd_1234

ok, but will that make the car not start?

Mahjik

iTrader: (1)

The car will run just fine with a faulty or bad oil pressure sending unit.

chrisd_1234

ok cheers, do you have any idea of what my problem may be?

Sprockett

What problem? You said it was running fine now

As a general rule, don't trust the stock oil pressure gauge. It's not known for being accurate.

chrisd_1234

na its not running at all. starter motor is turning over but engine doesn't kick in. the needle on the oil pressure guage doesn't even move.

Busted7

Its an electronic pressure gauge and wont read when engine cranks.

GoodfellaFD3S

iTrader: (213)

The stock oil pressure gauge works great, provided you have a good sending unit.

Your non-starting issues are in no way related to oil pressure.

chrisd_1234

ok so if that isn't the problem can anyone help me?

GoodfellaFD3S

iTrader: (213)

At this point, I'd recommend getting it flatbedded to the nearest competent rotary shop. Where are you located?

chrisd_1234

im in plymouth, uk. i know rx7 specialist dragon performace so will most probably take it there.