Engine & Transmission Post your Engine and Transmission related problems here.
Sponsored by:
Sponsored by:

Replaced intake gasket, now won't start - backfires...

  #1  
Old 05-31-2011, 10:21 AM
New Member
Thread Starter
Join Date: May 2011
Posts: 5
drew_fur is on a distinguished road
Default Replaced intake gasket, now won't start - backfires...

I have a 1990 S-10 Blazer, 4.3L TBI, 2WD. It wouldn't idle and was running lean (code 44) - I found an intake leak on rear passenger side. Yesterday I replaced the intake gaskets. I forgot to mark the distributor before pulling it, so I attempted to reset base timing. Got #1 cylinder to TDC and re-seated the distributor aiming it at #1 point. When I tried to start it, it would backfire through TBI and never start. I'm guessing I didn't get the timing right - either didn't have set to proper TDC or distributor should be positioned differently. Any thoughts - timing or something different? What position should distributor be in when seated at TDC? Thanks in advance.
 
  #2  
Old 05-31-2011, 08:45 PM
Starting Member
Join Date: Jul 2010
Location: Minnesota
Posts: 181
Z71_Guy is on a distinguished road
Default

sounds like your 180* off are you sure you were at TDC on the compression stroke. both valves should be closed
 
  #3  
Old 06-01-2011, 09:58 AM
New Member
Thread Starter
Join Date: May 2011
Posts: 5
drew_fur is on a distinguished road
Default

That was it...tried it again making sure piston was pushing out air when setting TDC. Cranked right up. Now I'm back to my original problem (I was hoping it would be fixed after changing intake gasket)...I'll start a new thread for that issue. Thanks again.
 
  #4  
Old 06-08-2011, 03:52 AM
Beginning Member
Join Date: Jun 2011
Location: Indianapolis, IN
Posts: 20
Blazed&Confused is on a distinguished road
Default

Check the gasket between the intake and throttle body for leaks. Also could be the large hose going to the brake booster or bad brake booster if your brakes seem hard to push. Could even be a cracked throttle body too.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
blazerdude98
Engine & Transmission
3
11-03-2011 09:38 PM
spiderbalze
2nd Gen S-series (1995-2005) Tech
11
10-25-2011 09:40 AM
kermit1112
2nd Gen S-series (1995-2005) Tech
20
01-21-2010 11:20 AM
polecat
2nd Gen S-series (1995-2005) Tech
7
03-29-2008 07:45 PM
rtgordon
Engine & Transmission
15
03-29-2008 12:42 PM


Thread Tools
Search this Thread
Quick Reply: Replaced intake gasket, now won't start - backfires...


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.