What is the next step in fixing an intermittent stall? at the end of my rope!
1998 Toyota Corolla

What is the next step in fixing an intermittent stall? At the end of my rope!

(1998 Toyota Corolla)
Hi!
I have a 1998 Toyota Corolla CE which is MOSTLY great and only has 101,000 miles on it. However, it has been randomly stalling during the last few months, mostly at red lights or when turning the steering wheel all the way. No noise, no shaking-just like someone turned the key and shut the car off. No engine codes. Car always restarts right away. Starter was replaced fairly recently. Coolant sensor, battery and alternator all fine. We replaced the MAP sensor, PCV valve and spark plugs,as well as the idle air control valve.Throttle body is clean. I can't keep replacing random parts, but I am scared to drive the car. Local Japanese car mechanic is stumped. Thanks in advance!
Car hesitates or stumbles once in a while.
What seems to make the problem better or worse? Usually worse when engine cold, or when car has been driven and then sat for a while.
How long have you had this problem? About two months
Tags: toyota, corolla
1 answer & 2 comments
Popular Answer
on October 31, 2019

With scan tool connected check throttle position sensor voltage @ idle.

Look at base idle rpms and compare to desired idle rpm.

Check for vacuum leak.

Make SURE there are NO possible air leaks in that big rubber tube from air cleaner to intake plenum!

Good luck!
Sign in to reply
on October 31, 2019

Professional quality scan tool with ‘experienced’ personnel required!
on November 01, 2019

Not going to explain the significance of each test posted - an experienced / professional will already know..

Closely inspecting the rubber air tube is something the DIYer can do - do not take that step for granted - it is very important!
Coolant Leak Diagnosis
$88 - $111 Learn More
on October 31, 2019

With scan tool connected check throttle position sensor voltage @ idle.

Look at base idle rpms and compare to desired idle rpm.

Check for vacuum leak.

Make SURE there are NO possible air leaks in that big rubber tube from air cleaner to intake plenum!

Good luck!
Sign in to reply
on October 31, 2019

Professional quality scan tool with ‘experienced’ personnel required!
on November 01, 2019

Not going to explain the significance of each test posted - an experienced / professional will already know..

Closely inspecting the rubber air tube is something the DIYer can do - do not take that step for granted - it is very important!

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Hi there- if i may seek some advise - i have a 1997 toyota corolla-mileage 114,115- no check engine light- ever - oil...
I received a letter about a transmission recall in my 2017 toyota corolla. i looked up recalls and couldn’t find this...