Jump to content

Photo

Engine Stops on left hand turns

- - - - - Spec Spec Miata Issues

  • Please log in to reply
28 replies to this topic

#21
SaulSpeedwell

SaulSpeedwell

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 792 posts
  • Location:NEOhio

Don't disagree with logging fuel pressure.

Why do so few use a visible (outside the windshield)  fuel pressure gauge with snubber?

 

My opinion:  Because why try to save $100-ish to run a mechanical gauge on the outside versus just running an electronic gauge with 2-3-ish fewer high-pressure joints to worry about atomizing fuel all over the engine bay or windshield?   (I don't love the SCCA fuel port for similar reasons, and I get nervous when people don't run the cap on the port itself!)


For faster reply than PM:  miataboxes>>>AT<<<gmail>>DOT<<<com


#22
Bench Racer

Bench Racer

    Different strokes for different folks : )

  • Members
  • PipPipPipPipPip
  • 5,508 posts
  • Location:Wauwatosa, WI
  • Region:Milwaukee
  • Car Year:1990
  • Car Number:14

Different Strokes For Different folks. Frugal me will trust a mechanical system with joints long over an electrical system. My fuel port and any car I work on has the cap. Cleaning the engine bay now and then is goooood. :bigsquaregrin:


Broken record - You are starting to sound like a broken record. Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver

#23
Brandon

Brandon

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 765 posts
  • Location:North Jersey
  • Region:NNJR
  • Car Year:1996
  • Car Number:48SM

Check your battery tie-down too.

 

I only had cut-out issues in turns at WGI when going over the curbs. The damn battery was vibrated to the right (on left-hand turns) and would short out the positive post on the tie-down bracket.

Taped it up, put a block of wood on the right side, even double-stick tape on the bottom has finally cured it from moving under the bracket.

 

Might be time to get a new bracket I think...


Bona fide - A bonafide Spec Miata driver

#24
Ron Alan

Ron Alan

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 3,732 posts
  • Location:Northern CA
  • Car Year:1995

Different Strokes For Different folks. Frugal me will trust a mechanical system with joints long over an electrical system. My fuel port and any car I work on has the cap. Cleaning the engine bay now and then is goooood. :bigsquaregrin:

My last build(PTC car)had all quality electric stepper gauges...so simple/clean/ACCURATE! Will never bother with mechanical gauges again!

 

Your absolutely correct Saul...did not have a cap on the schrader valve test port at the FPR and when it started leaking very slowly it took awhile to figure out why i kept smelling fuel! 


  • Danny Steyn likes this

Ron

RAmotorsports

 

Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver

#25
Jack Martin

Jack Martin

    Member

  • Members
  • PipPipPip
  • 12 posts
  • Location:Hutchinson, Kansas
  • Region:Wichita
  • Car Year:1992
  • Car Number:30

I read this thread and decided it was a good place to post my problem.  1992  1.6 NA. 125K miles. Car has been sitting for 12 years

 

I have a bad stumble on left hand corners as I accelerate out of the corner. I didn't see the tach drop to zero.

1.  1/3 tank of gas then added 5 gal. No change.

2.   New fuel pump (before problem started.). Pulled it out, checked sock, fuel return and wiring and all looked good. Tank baffle looked good.

3.   Thinking electrical I hot wired pump and cleared up problem.  (ABAB test). Tested in our parking lot with a max speed of around 22-24 MPH.

Not wanting to run a hot wired pump. I will check the wires on the cam angle sensor.   Is there a roll over safety switch and where is it?

Any other ideas where to look for an electrical problem?

One other possibility.  It may be heat related as it started after about 5-6 laps.

 

Any help is appreciated.

Thanks



#26
Alberto

Alberto

    Veteran Member

  • Members
  • PipPipPipPipPip
  • 1,471 posts
  • Location:Mountain View, CA
  • Region:SFR
  • Car Year:1990

Had the same issue with 2 different cars. On the 1.6 it was in the harness right around the steering column...loosing fuel pump power. 

 

Have you tried this?


Bona fide - A bonafide Spec Miata driver

#27
Jack Martin

Jack Martin

    Member

  • Members
  • PipPipPip
  • 12 posts
  • Location:Hutchinson, Kansas
  • Region:Wichita
  • Car Year:1992
  • Car Number:30

I will check that.

Thanks



#28
Tom Hampton

Tom Hampton

    Egregious Member

  • SMembers
  • PipPipPipPipPip
  • 2,060 posts
  • Location:Mckinney, tx
  • Region:South west
  • Car Year:1992
  • Car Number:41
I had the same issue a couple years ago. Turned out to be poor contacts in the fuel pump connector. Used a dental tool to squeeze the socket contacts tighter.
  • Ron Alan likes this

-tch
Build: www.tomhampton.info

video: vimeo.com/tomhampton

Support: X-Factor Racing

 

I didn't lose, I just got outspent!

Beta-Tester - Assisted us with beta testing the website. Donor - Made PayPal donation Bona fide - A bonafide Spec Miata driver

#29
RWP80000

RWP80000

    Member

  • Members
  • PipPipPip
  • 161 posts
  • Location:Phoenix
  • Region:SoPac
  • Car Year:1999
  • Car Number:2

When the check valve went bad on my '99 fuel pump, it would do similarly "instantaneous" fuel pressure drops with anything less than ....say ... 3 gallons in the tank?  Only in sharp left turns, IIRC.   There may have been other pump problems beyond the check valve, but the line pressure would definitely drop to <15psi pretty much as soon as you keyed off.  And the engine wouldn't fire back up until 10+ crank revolutions and the fuel pressure got back to high 30s psi. 

 

 

 

Saul's comment above aptly describes the symptoms of a recent failure which occured on our original 2011 99 SM build.  Turned out to be due to the deterioration of the short rubber connecting hose between the fuel pump and metal pipe on the tank pump module. It started out as a fairly small drop in fuel pressure with some intermittent signs of fuel starvation but pretty quickly developed into a serious leak internal leak from this approximately 2 inch length of fuel hose.  Lucky for us it was a simple and easy repair to replace this piece of hose.  Given the oxegenated fuels currently in use, I would recommend replacing this hose every year or so as preventative maintenance.

 

Rich Powers







Also tagged with one or more of these keywords: Spec, Spec Miata Issues

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users