Engine bogs when throttled quickly

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Engine bogs when throttled quickly #920048 12/11/08 02:36 AM

Joined: Jun 2007

Posts: 28

San Diego, CA

OFFRD88

Getting the Wheeling Fever

Just got the engine installed back in my '88 toy, It idles fine, and reves up well if I do it slowly. If I floor it quickly it bogs down badly. I've tried 2 different AFM's and messed with the TPS just by hand, and it doesn't seem to matter. It's as if it's hitting fuel cut. Only engine mods are I/H/E and mild cam (NWOR I think) Any thoughts? This is the not so rare 22RE.

Dave A.
88 P/U lots of mods
95 4Runner on 33's with a Detroit
Couple of mountain bike's rolling on 26's.

Re: Engine bogs when throttled quickly [Re: OFFRD88] #920049 12/11/08 03:59 AM

Joined: Jan 2000

Posts: 12,153

N. California. USA

4Crawler

Web Wheeler

Might check for cracks in the intake tubing between the AFM and the throttle body. Sometimes the rubber parts can crack and as the engine twists under hard acceleration, those cracks can pull open and the air leak will cause the engine to stumble and stall.

r.c.brown@ieee.org
TruckEditor@tlca.org
Project: 4Crawler
4Crawler OffRoad - 4x4Wire discount code

Re: Engine bogs when throttled quickly [Re: 4Crawler] #920050 12/11/08 06:02 AM

Joined: Feb 2004

Posts: 1,379

boonies of NH

Scerb

Body Damage is Cool

Usually its hard to adjust the TPS correctly without a feeler gauge. I would do that.

http://www.scerbfab.com/carb_faq.html

Re: Engine bogs when throttled quickly [Re: Scerb] #920051 12/12/08 11:01 PM

Joined: Sep 2005

Posts: 970

Winston-Salem NC

RatLabGuy

Rock Warrior

Have you measured/tested the fuel pressure?

With 200+ Billion electrical parts, the world most complicated machine is inside your own skull.

Question Reality.
-----------------------------
'89 Rnr DLX "SR4.5", 32s w/ 5.29 locked f/r blah blah

Re: Engine bogs when throttled quickly [Re: RatLabGuy] #920052 12/15/08 05:35 AM

Joined: Jun 2007

Posts: 28

San Diego, CA

OFFRD88

Getting the Wheeling Fever

Fuel pressure was around 40, I've got a gauge for it. It reves up no problem if you throttle it slowly, if you do it fast or full it bogs and really sounds like it may be cutting fuel. I've ordered another TPS just in case this one's bad, the spare I had was for the later throttle body. When I test it I seem to be able to get it within spec, but just in case there's dead spots or some other issue I'll have a second one to try.

Dave A.
88 P/U lots of mods
95 4Runner on 33's with a Detroit
Couple of mountain bike's rolling on 26's.

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