Roses games between Burnley and Sheffield Wednesday are rarely predictable affairs.
Just once in the last 15 meetings had the home side won; a sequence that was extended further after Sam Vokes 12th goal of the season was cancelled out by Chris Maguire.
Vokes struck three minutes before the break after the Clarets dominated the opening 45 minutes.
But Maguire earned a precious point for the Owls on the stroke of half time with a close-range effort.
And despite mounting increasing pressure on the Wednesday goal in the second half, the Clarets just could not find a way past the inspired Chris Kirkland in the visitors' goal.
Sean Dyche named an unchanged side to the team that beat Yeovil Town 2-1 at Huish Park.
And the Clarets started well, with Keith Treacy heavily involved against the club he joined on loan last season.
In the 11th minute the winger was a whisker away from opening the scoring as Burnley carved out the first opportunity. Vokes’ header fell behind the last man and when strike partner Danny Ings' attempted chip over Kirkland caught a glance off the keeper, Treacy was on hand, only for Glenn Loovens to knee his goalbound effort towards an open net for a corner.
At the other end it took a perfectly timed tackle eight yards from goal from David Jones to deny Kieran Lee a certain goal.
Twenty-one goal Ings was soon in on the act, following his piledriver at Yeovil with another long range effort that Kirkland gloved over.
And as the end-to-end start continued, Connor Wickham’s flick header sent Caolan Lavery free, only for the striker to fire across Tom Heaton and wide.
Back came Burnley and from Trippier’s throw, superb touch and awareness from Sam Vokes sent Dean Marney clear, only for the midfielder to toe-poke wide as he homed in on Kirkland.
Burnley were now very much in the ascendancy and Treacy’s drilled left wing cross somehow evaded everyone to hand Wednesday another let off.
But three minutes before the break, the breakthrough finally arrived, as arney pounced to dispossess Semedo and dink a ball over the top for Vokes to slot confidently underneath the advancing Kirkland.
However, the lead lasted barely a minute as Wednesday levelled before the break.
A deep free kick was headed on and as the Clarets allowed it to bounce from a flick-on, Maguire made no mistake, rifling high into the net inside the six-yard box.
The second half began as a much tighter affair, before a deflected Lavery shot forced Heaton into evasive action just before the hour mark.
But somehow Wednesday survived when Burnley threatened with their first chance of the half in the 65th minute.
Vokes did brilliantly to chase the ball and spin his marker into the turf before cutting the ball back for the inrushing David Jones, whose goalbound effort was brilliantly headed off the line by a retreating Liam Palmer.
As Burnley moved up through the gears, Scott Arfield then saw a glorious chance flash across goal and wide as he took advantage of a defensive slip.
And the game fully opened up, Maguire was booked for a dive in the box as he went past Danny Lafferty in the aim of winning a penalty.
Ashley Barnes was handed a home debut with eight tense minutes remaining, replacing Treacy as Burnley went for the jugular.
But it was strike partner Ings who took centre stage in the dying minutes.
The striker first spurned a glorious chance as he failed to make connection with Trippier’s excellent right wing delivery.
Then, in the dying seconds of normal time he slammed a shot off the foot of the post after a long throw fell invitingly.
Seconds later, Ings brought yet another fine save from Kirkland as he spun in the box and went for the far corner.
But the former Liverpool stopper saved his best until last, earning his side a pojnt with a breathtaking last-gasp save from the Clarets top scorer after Barnes chased a lost cause down the left.
Burnley: Heaton, Trippier, Duff, Shackell, Lafferty, Treacy (Barnes 82), Marney, Jones, Arfield, Ings, Vokes.
Subs: Cisak, Long, Stock, Kightly, Stanislas, Edgar.
Booked: Marney 88
Sheffield Wednesday: Kirkland, Palmer, Onyewu, Loovens, Mattock, Lee, Semedo, Maguire (McCabe 90), Maghoma (Nuhiu 68), Wickham, Lavery (Helan 84)
Subs: Martinez, McPhail, Llera, Johnson
Booked: Semedo 64, Wickham 68, Magiure 78, Mattock 81
Referee: Mr Stuart Atwell
Att: 13,735 (1,848)