| [ Total Views: 630 | Total Replies: 8 | Thread Id: 71353 ] |
|
|
 Hutcho
Wolfsburg Wizard
Posts: 528
Threads: 69
Registered: August 30th, 2002
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Hyde
|
| posted on August 26th, 2008 at 07:52 PM |
|
|
1.7ltr FI issue.....
Hey Guys,
Hoping someone could point me in the right direction.
I can start the car up in the morning and I idles great. I can drive it after that and it drives strong and powerful (as powerful as a FI 1.7ltr motor
can be ;-) ) but it comes to a point after about 20 minutes of driving that the motor stutters a bit then goes fine again but wont idle??? As long as
the car is driving, it goes great but it just wont idle.....
Im starting to think it may be a vacuum or compression problem???
Can anyone help?
Thanks,
Steve
|
|
|
PurpleT3
Fahrvergnugen
Posts: 880
Threads: 55
Registered: April 8th, 2003
Member Is Offline
Location: Knox, Melbourne
Theme: UltimaBB Pro Blue ( Default )
Mood: knackered
|
| posted on August 26th, 2008 at 09:20 PM |
|
|
Is it a type 3 or type 4 FI motor? Is the FI stock or aftermarket?
Either way it sounds like it might be related to the idle circuit or cold start enrichment not functioning properly. Engine cold - all OK, engine hot
- revs ok, idle crap.
I'm thinking that compression problem would make it crap all the time.
Ain't nothin' like the wind in your hair.
|
|
|
 vw54
Super Administrator
Always Waiting 4 Friday
Posts: 16723
Threads: 378
Registered: August 26th, 2002
Member Is Offline
Location: Sunny Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Oval resto ongoing
|
| posted on August 27th, 2008 at 07:01 AM |
|
|
yes compression would make it crap all the time
its in one of the sensors possible head temp and after 20 mins its warm and may be open circuit
|
|
|
Hutcho
Wolfsburg Wizard
Posts: 528
Threads: 69
Registered: August 30th, 2002
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Hyde
|
| posted on August 27th, 2008 at 07:36 PM |
|
|
Thanks, guys.
Its a Type 4 motor , original 1.7ltr D-Jet Injection. Yeah, sounds right with the compression.
Ill check the CHT (cylinder head sensor) tomorow. From recent research, its supposed to be 2k ohm cold and around 200 ohm hot...
A guy had the exact symptoms Im having (on a different flat four) and he let me know that he replaced the MPS (Manifold Pressure Sensor) and all was
good. Thats concerning cause its apparently a new one in my car. Will let you know!
Hutcho
|
|
|
Hutcho
Wolfsburg Wizard
Posts: 528
Threads: 69
Registered: August 30th, 2002
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Hyde
|
| posted on September 14th, 2008 at 06:30 PM |
|
|
Ok, Cylinder head temp sensor is good. MPS is good. (holds a vacuum). Ive bypassed the Cold Start Valve/Injector (which is located in the Throttle
body) on suspicion it may be leaking so its flooding the car and stalling it.
Another symptom is when it wont idle ie hot, I can hold the accelerator flat to the floor and it barely revs until about 10 or so seconds later. It
really feels like its flooding for some reason..
If anyone has any ideas Id love to hear them otherwise its off to the Mechanics..... I hate not solving these kind of problems...
Steve
|
|
|
greedy53
Bishop of Volkswagenism
Posts: 3062
Threads: 468
Registered: March 4th, 2006
Member Is Offline
Location: camden nsw 2570
Theme: UltimaBB Pro Grey
Mood: strung out
|
| posted on September 15th, 2008 at 05:19 PM |
|
|
that could be why most folks change over to carbys the injection in a bugger when old
|
|
|
Hutcho
Wolfsburg Wizard
Posts: 528
Threads: 69
Registered: August 30th, 2002
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Hyde
|
| posted on September 16th, 2008 at 07:00 PM |
|
|
| Quote: | Originally
posted by greedy53
that could be why most folks change over to carbys the injection in a bugger when old
|
Thats cheating!
914's dont run too great on carbs anyway...
|
|
|
grumble
Son of Jim - Creator of Good
Posts: 2668
Threads: 53
Registered: June 10th, 2008
Member Is Offline
Location: Taree
Theme: UltimaBB Pro Blue ( Default )
Mood: happy all the time
|
| posted on September 16th, 2008 at 10:25 PM |
|
|
After spending untold hours testing swapping & buying head temp sensors,air flow meters,exchange computers etc I have to agree with greedy53 a
good pair of rebuilt stock carbies & factory fittings & she'll run like new with a lot less heartache. I persevered because I thought it's a
basic system & can't be much wrong but in the end I bit the bullet & I have a happy customer.
|
|
|
Hutcho
Wolfsburg Wizard
Posts: 528
Threads: 69
Registered: August 30th, 2002
Member Is Offline
Location: Sydney
Theme: UltimaBB Pro Blue ( Default )
Mood: Hyde
|
| posted on September 17th, 2008 at 06:57 AM |
|
|
| Quote: | Originally
posted by grumble
After spending untold hours testing swapping & buying head temp sensors,air flow meters,exchange computers etc I have to agree with greedy53 a
good pair of rebuilt stock carbies & factory fittings & she'll run like new with a lot less heartache. I persevered because I thought it's a
basic system & can't be much wrong but in the end I bit the bullet & I have a happy customer.
|
Fair enough... not what I really wated to hear though 
Dont still have any of that efi gear do you?
Steve
|
|
|
