Paulyy

just driving down a road at 70 km/h and all of a sudden the car wouldn't accelerate, AFRs showed rich around 8:1 with the FQS on -5%

- Fuel pressure is fine
- spark plug leads are fine
- rotor is fine, cap was cracked, replaced with a spare and no difference
- sparkplugs, haven't checked but will soon so please don't mention it.

Edit:
- All vaccum lines are in tact, no leaks,
- ic pipes are all there and connected.


How do i test the tps?
Other tests i should do?

i am really pissed off

333pg333

You're so pissed off you sent your Big Toe home? Or did the car just stall and die and you had to get a TOW home? Sorry, bummer. So it doesn't start at all, or just turns over and dies again? If it's a matter of driving it and you sort of hit a wall maybe check the values in the cells of the software to see that you haven't accidentally put a couple of wrong numbers in there. That is presuming that you self tune via laptop with Rogue's software. Ignore this if that's not the case. You're just running regular pump fuel Paulyy? Or could it be something's corrupting the MAF sensor and the system is over fueling?

mclarenno9

Check your IC pipes / connectors / vacuum lines, etc.

Paulyy

When it first happened it felt like i hit a wall then lost all power. it started but it was miss firing and wouldn't keep idle and die. black smoke was chugging out the exhaust like it would when it runs rich.
can't change anything to do with the software, only FQS and coding plug.
I don't think it will be the maf sensor i've had a look at it but will properly soon.

It might be the TPS, i'm just reading how to test it properly.

It pretty much sounds like a wankel rotary engine LOL!

sorry forgot to add, yes they're all connected

Black51

Maybe the engine just evolved into a Mazda 787B engine! Wouldn't that be somthin'!...

What about the coil? Definitely check what you're gonna check; to me, it sounds like there just isn't proper ignition.

What vacuum do you see when it's misfiring at idle?

Edit: And make sure the MAF is all wired properly. Been a few guys lately with that problem.

Rogue_Ant

Check the line to the MAP sensor, and your other vacuum lines / couplers. If these check out I will send you info on how to test the other hardware, but let's first make sure everything is in order - it is pretty normal to have something simple occure after just getting the motor back together.

Paulyy

If the engine evolved into a 787B the thread would be "in the matter of minutes my car went from 200 rwhp to 700rwhp "

We'll there is a spark and a dam big one. it arked around 7cm!

i get -10 - -8 psi on the 2boost 2

And the maf is wired up properly

I'm 100% sure the vaccum lines to the map sensor are connected. that was the 1st thing i checked. no boost leaks, nothing like that.

i took the TPS off and got my digital volt meter and did an ohms test. we got a reading when it clicks but nothing on any pin would get it to read when theres a change in throttle position.

Rogue_Ant

Ok, how did you connect the MAP sensor wiring?
With the engine off, but key on - what voltage are is on the green line from the MAP sensor?

Also, make sure the chip is seated all the way.

Paulyy

I'll be back with an answer shortley!

Paulyy

I connected the MAP sensor like you explained in your web page.

1.534v on the green wire.

I'll double check the chips are in properly, but im sure they're in because the first time i put them in the fell out and figured that one out. i put them in pretty tight.

Rogue_Ant

Ok, now test the green wire again, with the engine idling (if you can).
Additionally, test the MAF blue wire with the engine idling.

When I asked how you connected the MAF, I meant to say did you solder the connections or crimp them?

Is the coding plug connected or not? And what fuel are you currently using?

The fact that it was running correctly, then suddenly is not suggest that something has changed - we just need to find out what it is.

Paulyy

Okay I'll try get this done tomorrow. It's 9:20 and I've got "work" in the city tonight.

The MAP is soldered to the harness. done properly.

I just want to note if you missed it, i couldn't get a reading out of my TPS. i've taken that off and tested every pin. only got a reading when the idle switch got switched on.

ausgeflippt951

When you say "'work' in the city tonight," for some reason an image of a call girl came to mind... Moonlighting, are we? Either that, or as a drug dealer.


This sounds like a wiring issue to me -- you've got to be shorting somewhere all of a sudden.

Collin

reno808

did you check ur spark plugs?
did you check your those connects on ur maf?
did you check ur ref sensors?

Oddjob

If you dont find the problem elsewhere:

I had a TPS fail in the full load position, so the DME ran the full load fuel maps. Killed the car, wouldnt restart due to too much fuel. Smoked black and could smell raw fuel in the exhaust.

Also recheck for vacuum leaks, holes in the backsides of the intake boots, etc. Have also had that keep a car from running.