Site Search
Print Page Setup Profile Login
You have 4 items in your shopping cart
Section Image

Backfiring/Missing GQ

Submitted: Tuesday, Feb 01, 2005 at 13:49

Hano

Hi all, thanks for replys on previous posts, when I have a spare $50 I will join up. mY 89 GQ has been backfiring and missing for sevearl months. I have tried changes, one thing at a time, but there doesnt seem to be any thing that makes it better for more than a few weeks. I have tried, fuel filter, fuel pump, spark plugs, leads, coil lead, metho in the fuel tank (water?), dizzy cap, points, rotor. Its driving me crazy. Whilst the spark plugs have improved fuel efficiency, and it doesnt back fire as much, it has a really annoying miss. The only way to describe it is that it breaks down, usually up hill, and often when adjusting speed from coasting and then slightly accelerating at 100ks/hr for instance. Usually not a problem when cold, more often when at running temp. The needle on the taco goes mental. it doesnt last more than a few seconds.
Could it be float, coil what do I do next. ihave had the timing adjusted and checked by two reputable(?) mechanics in Perth and basically just got short changed with no improvement or suggestions.
What do you guys think?
Happy Trails
Hano
Advertisement
ThreadID: 20011 Replies: 8
Views: 531 FollowUps: 2
This Thread has been Archived
Thread Summary
Thread Watch Back To Forum Alert Moderator FAQ
AnswerID: 96046   Submitted: Tuesday, Feb 01, 2005 at 13:54

Truckster (Vic) replied:

Have you rebuit the carby?
Reply 1 of 8
AnswerID: 96048   Submitted: Tuesday, Feb 01, 2005 at 14:00

Alan S (WA) replied:

Hano

Have you checked or replaced all vacuum hoses?
Reply 2 of 8
AnswerID: 96049   Submitted: Tuesday, Feb 01, 2005 at 14:06

Tony N. (VIC) replied:

Had a simular problem with a 55 series L/C.

It would backfire at varing times and the tacho would go nuts.

Worked out it was a faulty Electronic ignition (after market), I had breakerless ignition and I had upgraded the coil to a Bosch GT40R and it killed the ignition unit.

The other thing that could be causing your problem is the condensor that is in the distributer, it could be breaking down and causing a false spark.

Hope this helps.

Tony N.
Reply 3 of 8
FollowupID: 354857   Submitted: Tuesday, Feb 01, 2005 at 16:50

G.T. posted:

Spot on! I chased an intermittent miss fire until I replaced the condensor. Problem solved ! regards G.T.
FollowUp 1 of 1
AnswerID: 96087   Submitted: Tuesday, Feb 01, 2005 at 17:00

Chucky replied:

I would check that all your electrical connections are good on the ingnition system. From what you say it sounds like a short somewhere that is causing power loss in the electrical system.
Reply 4 of 8
Activities Index
Jet Boat Adventure Gold Coast Jet Boat Adventure Gold Coast
Gold Coast - QLD
Jet Boating Gold Coast!
Pamper & Pole Dancing - Ultimate Hen Pamper & Pole Dancing - Ultimate Hen's Party
Sydney - NSW
The Pole Dancing & Pamper Package is the perfect experience for a memorable hen's night.
Beach Landing Tandem Skydive 14,000ft Beach Landing Tandem Skydive 14,000ft
Sunshine Coast - QLD
Australia's Only Barefoot Beach Tandem Skydive!
Yoga Pass Intro for 10 Classes National Yoga Pass Intro for 10 Classes National
Sydney - NSW
Need to unwind and relax?
Book Now - Things To Do
AnswerID: 96104   Submitted: Tuesday, Feb 01, 2005 at 17:56

muzzimbidgie replied:

I had a similar problem with a 60 series cruiser.

Ended up being a stuffed shaft inside the distributor. The only way the mechanic found it, after months of fualt finding missions, was to remove the distributor from the side of the engine and check for freeplay in the the shaft.
Reply 5 of 8
AnswerID: 96106   Submitted: Tuesday, Feb 01, 2005 at 18:02

GOB & denny vic member replied:

as a former owner witha similar problem get an extended rotor it will cure your problem straight away
you can order over the phone from lpg 1 in lilydale melb

steve
steve with beard & hair???
Click Image to Enlarge
currently in broken hill for a week or so
Reply 6 of 8
AnswerID: 96107   Submitted: Tuesday, Feb 01, 2005 at 18:04

Member - 'Lucy' replied:


Evening Hano

I have a friend who had a ford escort some years ago which was doing exactly the same.

We finally pegged it down to the condensor in the 'dizzy'.

B A S T A R D of a thing was alright when cold/warm, however as soon as it got hot, hell it had a mind of its own.

The temperature aspect may be a hint to what it is in your case.

New condensor returned it to normal.

Regards

Ken Robinson
It's not pretty
Click Image to Enlarge
Marriage, One mans insane desire to feed and clothe another mans daughter

Reply 7 of 8
FollowupID: 354871   Submitted: Tuesday, Feb 01, 2005 at 18:13

Hano posted:

Looks like I have a direction to follow, thanks Fellas, off to the shops for a condensor first, then see what happens....
Hano
FollowUp 1 of 1
AnswerID: 96256   Submitted: Wednesday, Feb 02, 2005 at 14:02

stephenjNQ replied:

hano , GOB has the answer, my maverick was doing the same , replaced everything from plugs , cap ,lead ,coil and rotor button. still not fixed ,put extended rotor problem gone. regards stephenjNQ
Reply 8 of 8