Pennock's Fiero Forum
  Technical Discussion & Questions
  Rotates but wont start

Post New Topic  Post A Reply
Email This Page to Someone! | Printable Version


next newest topic | next oldest topic
Rotates but wont start by GizmoKershner
Started on: 08-12-2014 01:46 AM
Replies: 18 (295 views)
Last post by: GizmoKershner on 08-14-2014 08:25 PM
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-12-2014 01:46 AM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
Compression test was fine, fuel pressure is good, was no spark, but replaced ignition coils and fixed that. Still won't start, suggestions?
IP: Logged
PFF
System Bot
phonedawgz
Member
Posts: 17011
From: Green Bay, WI USA
Registered: Dec 2009


Feedback score:    (23)
Leave feedback





Total ratings: 290
Rate this member

Report this Post08-12-2014 01:53 AM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
What year? What engine?

You do have spark?

Does the tach rise to 200 RPM during cranking?

Any story as to what just happened that it doesn't start? Maybe like it sat for 5 years? Or just ran yesterday?

[This message has been edited by phonedawgz (edited 08-12-2014).]

IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-12-2014 03:50 AM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
88 2.5 4 cylinder. It sat for three days, was running fine. Had to crank for awhile to start at first, but now won't start at all. It has spark now.
IP: Logged
phonedawgz
Member
Posts: 17011
From: Green Bay, WI USA
Registered: Dec 2009


Feedback score:    (23)
Leave feedback





Total ratings: 290
Rate this member

Report this Post08-12-2014 04:28 AM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
While cranking look down the throttle body. Is it injecting fuel?
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-12-2014 10:13 AM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's getting fuel and spark. Here's a question for you. It was running really rough because the egr was stuck open and the mechanic that was working on it blocked it off and said I didn't need it because there is no emissions here. Could that cause the no start?
IP: Logged
theogre
Member
Posts: 29403
From: USA
Registered: Mar 99


Feedback score: N/A
Leave feedback





Total ratings: 550
Rate this member

Report this Post08-12-2014 04:25 PM Click Here to See the Profile for theogreClick Here to visit theogre's HomePageSend a Private Message to theogreEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by GizmoKershner:
It's getting fuel and spark. Here's a question for you. It was running really rough because the egr was stuck open and the mechanic that was working on it blocked it off and said I didn't need it because there is no emissions here. Could that cause the no start?

Good luck with that plan. 87 and up DIS engines often will have problems w/o good EGR.

Why? GM programed DIS ECM to assume a good EGR or engine can, likely will, knock.

OE type EGR listed in... See my Cave, Emissions

EGR = No start? Maybe. Check for other vacuum leaks.

Also See my Cave, DIS Ignition
Bad plugs/wires can cause big problem, Including "fake" EGR problems.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)


The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)

IP: Logged
TopNotch
Member
Posts: 3537
From: Lawrenceville, GA USA
Registered: Feb 2009


Feedback score:    (7)
Leave feedback





Total ratings: 59
Rate this member

Report this Post08-12-2014 05:28 PM Click Here to See the Profile for TopNotchClick Here to visit TopNotch's HomePageSend a Private Message to TopNotchEdit/Delete MessageReply w/QuoteDirect Link to This Post
Look through the oil filler cap while someone cranks the engine, to see if the rockers move. If not -- broken timing gear.
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-12-2014 07:49 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
I took off the egr and it didn't look like it was blocked off at all, but he said he did and that fixed the previous problem of shaking with low acceleration. Also I cannot find where he put the vaccum line running off the egr.
IP: Logged
NW-Fiero
Member
Posts: 443
From: Pierce County - WA
Registered: Aug 2008


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-12-2014 09:25 PM Click Here to See the Profile for NW-FieroSend a Private Message to NW-FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
If the mechanic removed the vac line the EGR solenoid will have an open connection.
.





------------------
Mark
' 85 2m6 3.4PR
In the Great Northwest!

[This message has been edited by NW-Fiero (edited 08-12-2014).]

IP: Logged
TopNotch
Member
Posts: 3537
From: Lawrenceville, GA USA
Registered: Feb 2009


Feedback score:    (7)
Leave feedback





Total ratings: 59
Rate this member

Report this Post08-13-2014 11:03 AM Click Here to See the Profile for TopNotchClick Here to visit TopNotch's HomePageSend a Private Message to TopNotchEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by NW-Fiero:

If the mechanic removed the vac line the EGR solenoid will have an open connection.



There's no EGR solenoid on the 4-cylinder. Also, the EGR can't be tested by applying vacuum to the vacuum line fitting on it. The only way to test the EGR on a 4-cylinder is to run the engine, slowly increase RPM's, and see if the diaphragm in the EGR valve rises. It is controlled by a combination of vacuum and back pressure, and neither alone can open it.

IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 11:35 AM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
He put a cap on the vaccum out of the intake I found. Also I found that the injector is not squirting fuel upon cranking, but fuel is making it to it.
IP: Logged
PFF
System Bot
TopNotch
Member
Posts: 3537
From: Lawrenceville, GA USA
Registered: Feb 2009


Feedback score:    (7)
Leave feedback





Total ratings: 59
Rate this member

Report this Post08-13-2014 03:11 PM Click Here to See the Profile for TopNotchClick Here to visit TopNotch's HomePageSend a Private Message to TopNotchEdit/Delete MessageReply w/QuoteDirect Link to This Post
How do you know fuel is getting to the injector? Did you remove it? If you remove it right after an attempt to start, you should get quite a squirt of gas (in your face if you're hovering over the throttle body).
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 05:42 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
That's exactly what I did. Haha minus the squirt to the face, I had a rag. My friend is bringing a multi meter over to see if it's the injector or the relay.
IP: Logged
NW-Fiero
Member
Posts: 443
From: Pierce County - WA
Registered: Aug 2008


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 06:48 PM Click Here to See the Profile for NW-FieroSend a Private Message to NW-FieroEdit/Delete MessageReply w/QuoteDirect Link to This Post
Starting Fluid Spray ....any effect.
.
Sorry missed the 88 Duke. post

------------------
Mark
' 85 2m6 3.4PR
In the Great Northwest!

IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 09:30 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
Relay is good, just tried starting fluid with no effect. Starting to think the injector is actually good, but I didn't see fuel coming out when cranking it and I do believe a cone of fuel is suppose to come out. Also retested the spark and there is none. Ignition module is good, coils, plugs and wires I just replaced. Any thoughts on to what else will cause no spark?
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 09:32 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post

GizmoKershner

24 posts
Member since Jul 2014
Also I fixed the egr issue. I had to rely on my video on my phone to test for spark before so it is possible it wasn't sparking earlier.
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-13-2014 09:36 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post

GizmoKershner

24 posts
Member since Jul 2014
Also also, the rockers do move through the oil cap while cranking.
IP: Logged
TONY_C
Member
Posts: 2747
From: North Bellmore, NY 11710
Registered: May 2001


Feedback score: (2)
Leave feedback

Rate this member

Report this Post08-14-2014 10:33 AM Click Here to See the Profile for TONY_CSend a Private Message to TONY_CEdit/Delete MessageReply w/QuoteDirect Link to This Post
Crank Sensor?
IP: Logged
GizmoKershner
Member
Posts: 24
From: Rathdrum, Idaho 83858
Registered: Jul 2014


Feedback score: N/A
Leave feedback

Rate this member

Report this Post08-14-2014 08:25 PM Click Here to See the Profile for GizmoKershnerSend a Private Message to GizmoKershnerEdit/Delete MessageReply w/QuoteDirect Link to This Post
That's exactly what was wrong. Haha. Checked the crank position sensor, aka hall effect switch and it had a hairline crack I missed. Replaced and running like new. Thank you all for your help!
IP: Logged

next newest topic | next oldest topic

All times are ET (US)

Post New Topic  Post A Reply
Hop to:

Contact Us | Back To Main Page

Advertizing on PFF | Fiero Parts Vendors
PFF Merchandise | Fiero Gallery | Ogre's Cave
Real-Time Chat | Fiero Related Auctions on eBay



Copyright (c) 1999, C. Pennock